11x1 t05 01 permutations i (2011)
TRANSCRIPT
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The Basic Counting Principle
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The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
![Page 3: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/3.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled
![Page 4: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/4.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled(i) How many ways can the three dice fall?
![Page 5: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/5.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled(i) How many ways can the three dice fall?
666 Ways
![Page 6: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/6.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled(i) How many ways can the three dice fall?
666 Ways
iespossibilit6has die1st the
![Page 7: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/7.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled(i) How many ways can the three dice fall?
666 Ways
iespossibilit6has die1st theiespossibilit6hasdie2ndthe
![Page 8: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/8.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled(i) How many ways can the three dice fall?
666 Ways
iespossibilit6has die1st theiespossibilit6hasdie2ndthe
iespossibilit6has die3rdthe
![Page 9: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/9.jpg)
The Basic Counting PrincipleIf one event can happen in m different ways and after this another event can happen in n different ways, then the two events can occur in mn different ways.
e.g. 3 dice are rolled(i) How many ways can the three dice fall?
666 Ways
iespossibilit6has die1st theiespossibilit6hasdie2ndthe
iespossibilit6has die3rdthe612
![Page 10: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/10.jpg)
(ii) How many ways can all three dice show the same number?
![Page 11: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/11.jpg)
(ii) How many ways can all three dice show the same number?
116 Ways
![Page 12: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/12.jpg)
(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st the
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(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st theypossibilit1only has nowdie2ndthe
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(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st theypossibilit1only has nowdie2ndthe
ypossibilit1only has nowdie3rdthe
![Page 15: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/15.jpg)
(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st theypossibilit1only has nowdie2ndthe
ypossibilit1only has nowdie3rdthe6
![Page 16: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/16.jpg)
(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st theypossibilit1only has nowdie2ndthe
ypossibilit1only has nowdie3rdthe6
(iii) What is the probability that all three dice show the same number?
![Page 17: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/17.jpg)
(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st theypossibilit1only has nowdie2ndthe
ypossibilit1only has nowdie3rdthe6
(iii) What is the probability that all three dice show the same number?
2166same the3 all P
![Page 18: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/18.jpg)
(ii) How many ways can all three dice show the same number?
116 Ways
iespossibilit6has die1st theypossibilit1only has nowdie2ndthe
ypossibilit1only has nowdie3rdthe6
(iii) What is the probability that all three dice show the same number?
2166same the3 all P
361
![Page 19: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/19.jpg)
Mice are placed in the centre of a maze which has five exits.
Each mouse is equally likely to leave the maze through any of the five exits. Thus, the probability of any given mouse leaving by a particular exit is
Four mice, A, B, C and D are put into the maze and behave independently.
(i) What is the probability that A, B, C and D all come out the same exit?
51
1996 Extension 1 HSC Q5c)
![Page 20: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/20.jpg)
Mice are placed in the centre of a maze which has five exits.
Each mouse is equally likely to leave the maze through any of the five exits. Thus, the probability of any given mouse leaving by a particular exit is
Four mice, A, B, C and D are put into the maze and behave independently.
(i) What is the probability that A, B, C and D all come out the same exit?
51
1996 Extension 1 HSC Q5c)
51
51
511exit same theuse all P
![Page 21: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/21.jpg)
Mice are placed in the centre of a maze which has five exits.
Each mouse is equally likely to leave the maze through any of the five exits. Thus, the probability of any given mouse leaving by a particular exit is
Four mice, A, B, C and D are put into the maze and behave independently.
(i) What is the probability that A, B, C and D all come out the same exit?
51
1996 Extension 1 HSC Q5c)
51
51
511exit same theuse all P
1door any through gocan mouseFirst P
![Page 22: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/22.jpg)
Mice are placed in the centre of a maze which has five exits.
Each mouse is equally likely to leave the maze through any of the five exits. Thus, the probability of any given mouse leaving by a particular exit is
Four mice, A, B, C and D are put into the maze and behave independently.
(i) What is the probability that A, B, C and D all come out the same exit?
51
1996 Extension 1 HSC Q5c)
51
51
511exit same theuse all P
1door any through gocan mouseFirst P
51door samethrough
gomust miceOther
P
![Page 23: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/23.jpg)
Mice are placed in the centre of a maze which has five exits.
Each mouse is equally likely to leave the maze through any of the five exits. Thus, the probability of any given mouse leaving by a particular exit is
Four mice, A, B, C and D are put into the maze and behave independently.
(i) What is the probability that A, B, C and D all come out the same exit?
51
1996 Extension 1 HSC Q5c)
51
51
511exit same theuse all P
1door any through gocan mouseFirst P
51door samethrough
gomust miceOther
P
1251
![Page 24: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/24.jpg)
(ii) What is the probability that A, B and C come out the same exit and D comes out a different exit?
![Page 25: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/25.jpg)
(ii) What is the probability that A, B and C come out the same exit and D comes out a different exit?
51
51
541exitdifferent uses exit, same use DABCP
![Page 26: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/26.jpg)
(ii) What is the probability that A, B and C come out the same exit and D comes out a different exit?
51
51
541exitdifferent uses exit, same use DABCP
1door any through gocan D P
![Page 27: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/27.jpg)
(ii) What is the probability that A, B and C come out the same exit and D comes out a different exit?
51
51
541exitdifferent uses exit, same use DABCP
1door any through gocan D P
54
choosetodoors4hasmouseNext
P
![Page 28: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/28.jpg)
(ii) What is the probability that A, B and C come out the same exit and D comes out a different exit?
51
51
541exitdifferent uses exit, same use DABCP
1door any through gocan D P
54
choosetodoors4hasmouseNext
P
51door samethrough
gomust miceOther
P
![Page 29: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/29.jpg)
(ii) What is the probability that A, B and C come out the same exit and D comes out a different exit?
51
51
541exitdifferent uses exit, same use DABCP
1door any through gocan D P
54
choosetodoors4hasmouseNext
P
1254
51door samethrough
gomust miceOther
P
![Page 30: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/30.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
![Page 31: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/31.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
125
4exitdifferent uses DP
![Page 32: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/32.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
125
4exitdifferent uses DP
125
4exitdifferent uses AP
![Page 33: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/33.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
125
4exitdifferent uses DP
125
4exitdifferent uses AP
125
4exitdifferent uses BP
![Page 34: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/34.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
125
4exitdifferent uses DP
125
4exitdifferent uses AP
125
4exitdifferent uses BP
125
4exitdifferent uses CP
![Page 35: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/35.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
125
4exitdifferent uses DP
125
4exitdifferent uses AP
125
4exitdifferent uses BP
125
4exitdifferent uses CP
125
44exitdifferent uses mouseany P
![Page 36: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/36.jpg)
(iii) What is the probability that any of the four mice come out the same exit and the other comes out a different exit?
125
4exitdifferent uses DP
125
4exitdifferent uses AP
125
4exitdifferent uses BP
125
4exitdifferent uses CP
125
44exitdifferent uses mouseany P
12516
![Page 37: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/37.jpg)
(iv) What is the probability that no more than two mice come out the same exit?
![Page 38: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/38.jpg)
(iv) What is the probability that no more than two mice come out the same exit?
sameuse3sameall1exitsameuse2 than moreno PPP
![Page 39: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/39.jpg)
(iv) What is the probability that no more than two mice come out the same exit?
sameuse3sameall1exitsameuse2 than moreno PPP
12516
12511
![Page 40: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/40.jpg)
(iv) What is the probability that no more than two mice come out the same exit?
sameuse3sameall1exitsameuse2 than moreno PPP
12516
12511
125108
![Page 41: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/41.jpg)
Permutations
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PermutationsA permutation is an ordered set of objects
![Page 43: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/43.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
![Page 44: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/44.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
(i.e. use all of the objects)
![Page 45: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/45.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
If we arrange n different objects in a line, the number of ways we could arrange them are;
(i.e. use all of the objects)
![Page 46: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/46.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
If we arrange n different objects in a line, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use all of the objects)
![Page 47: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/47.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
If we arrange n different objects in a line, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use all of the objects)
1 n
2object for iespossibilit
![Page 48: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/48.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
If we arrange n different objects in a line, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use all of the objects)
1 n 2 n
2object for iespossibilit
3object for iespossibilit
![Page 49: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/49.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
If we arrange n different objects in a line, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use all of the objects)
1 n 2 n 1
2object for iespossibilit
3object for iespossibilit
objectlast for iespossibilit
![Page 50: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/50.jpg)
PermutationsA permutation is an ordered set of objects
Case 1: Ordered Sets of n Different Objects, from a Set of n Such Objects
If we arrange n different objects in a line, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
!n
(i.e. use all of the objects)
1 n 2 n 1
2object for iespossibilit
3object for iespossibilit
objectlast for iespossibilit
![Page 51: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/51.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
![Page 52: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/52.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen
![Page 53: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/53.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter
![Page 54: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/54.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
![Page 55: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/55.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
(ii) boys and girls alternate?
![Page 56: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/56.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
(ii) boys and girls alternate? (ALWAYS look after any restrictions first)
![Page 57: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/57.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
(ii) boys and girls alternate?
1tsArrangemen
boy a beMUSTperson first
(ALWAYS look after any restrictions first)
![Page 58: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/58.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
(ii) boys and girls alternate?
1tsArrangemen
boy a beMUSTperson first
(ALWAYS look after any restrictions first)
!5
boys thearrangingof waysofnumber
![Page 59: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/59.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
(ii) boys and girls alternate?
1tsArrangemen
boy a beMUSTperson first
(ALWAYS look after any restrictions first)
!5 !4
boys thearrangingof waysofnumber
girls thearrangingofwaysofnumber
![Page 60: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/60.jpg)
e.g. In how many ways can 5 boys and 4 girls be arranged in a line if;
(i) there are no restrictions?
!9tsArrangemen With no restrictions, arrange 9 peoplegender does not matter 362880
(ii) boys and girls alternate?
1tsArrangemen
boy a beMUSTperson first
(ALWAYS look after any restrictions first)
!5 !4
boys thearrangingof waysofnumber
girls thearrangingofwaysofnumber
2880
![Page 61: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/61.jpg)
(iii) What is the probability of the boys and girls alternating?
![Page 62: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/62.jpg)
(iii) What is the probability of the boys and girls alternating?
362880
2880alternate girls & boys P
![Page 63: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/63.jpg)
(iii) What is the probability of the boys and girls alternating?
362880
2880alternate girls & boys P
1261
![Page 64: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/64.jpg)
(iii) What is the probability of the boys and girls alternating?
362880
2880alternate girls & boys P
1261
(iv) Two girls wish to be together?
![Page 65: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/65.jpg)
(iii) What is the probability of the boys and girls alternating?
362880
2880alternate girls & boys P
1261
(iv) Two girls wish to be together?
!2tsArrangemen
arranged becan girlsthewaysofnumber the
![Page 66: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/66.jpg)
(iii) What is the probability of the boys and girls alternating?
362880
2880alternate girls & boys P
1261
(iv) Two girls wish to be together?
!2tsArrangemen
arranged becan girlsthewaysofnumber the
!8 others 7 girls) (2objects 8 arranging
ofwaysofnumber
![Page 67: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/67.jpg)
(iii) What is the probability of the boys and girls alternating?
362880
2880alternate girls & boys P
1261
(iv) Two girls wish to be together?
!2tsArrangemen
arranged becan girlsthewaysofnumber the
!8 others 7 girls) (2objects 8 arranging
ofwaysofnumber
80640
![Page 68: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/68.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
![Page 69: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/69.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
(i.e. use some of the objects)
![Page 70: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/70.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
(i.e. use some of the objects)
![Page 71: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/71.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use some of the objects)
![Page 72: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/72.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use some of the objects)
1 n
2object for iespossibilit
![Page 73: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/73.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use some of the objects)
1 n 2 n
2object for iespossibilit
3object for iespossibilit
![Page 74: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/74.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
(i.e. use some of the objects)
1 n 2 n 1 kn
2object for iespossibilit
3object for iespossibilit
kobject for iespossibilit
![Page 75: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/75.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
1231
1231121
knknknknknnnn
(i.e. use some of the objects)
1 n 2 n 1 kn
2object for iespossibilit
3object for iespossibilit
kobject for iespossibilit
![Page 76: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/76.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
1231
1231121
knknknknknnnn
(i.e. use some of the objects)
1 n 2 n 1 kn
2object for iespossibilit
3object for iespossibilit
kobject for iespossibilit
!! kn
n
![Page 77: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/77.jpg)
Case 2: Ordered Sets of k Different Objects, from a Set of n Such Objects (k < n)
If we have n different objects in a line, but only want to arrange k of them, the number of ways we could arrange them are;
ntsArrangemen ofNumber 1object for
iespossibilit
1231
1231121
knknknknknnnn
(i.e. use some of the objects)
1 n 2 n 1 kn
2object for iespossibilit
3object for iespossibilit
kobject for iespossibilit
!! kn
n
knP
![Page 78: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/78.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
![Page 79: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/79.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
58 Words P
![Page 80: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/80.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
58 Words P6720
![Page 81: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/81.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
58 Words P6720
b) they must begin with P?
![Page 82: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/82.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
58 Words P6720
b) they must begin with P?
1Words
first placed becan Pwaysofnumber the
![Page 83: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/83.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
58 Words P6720
b) they must begin with P?
1Words
first placed becan Pwaysofnumber the
47 P ROBLEMS
dsletter wor 4many howbecomesnowQuestion
![Page 84: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/84.jpg)
e.g. (i) From the letters of the word PROBLEMS how many 5 letter words are possible if;
a) there are no restrictions?
58 Words P6720
b) they must begin with P?
1Words
first placed becan Pwaysofnumber the
47 P ROBLEMS
dsletter wor 4many howbecomesnowQuestion
840
![Page 85: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/85.jpg)
c) P is included, but not at the beginning, and M is excluded?
![Page 86: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/86.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
![Page 87: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/87.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
![Page 88: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/88.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
![Page 89: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/89.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
![Page 90: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/90.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P
![Page 91: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/91.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
![Page 92: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/92.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
24 ons)(restricti Ways P
gocan Ted & BillWays
![Page 93: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/93.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
24 ons)(restricti Ways P
gocan Ted & BillWays
14P
gocan GregWays
![Page 94: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/94.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
24 ons)(restricti Ways P
gocan Ted & BillWays
14P 3
5P
gocan GregWays
gocan peopleremainingWays
![Page 95: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/95.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
24 ons)(restricti Ways P
gocan Ted & BillWays
14P 3
5P
gocan GregWays
gocan peopleremainingWays
2880
![Page 96: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/96.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
24 ons)(restricti Ways P
gocan Ted & BillWays
14P 3
5P
gocan GregWays
gocan peopleremainingWays
2880
201602880rightG left, T&B P
![Page 97: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/97.jpg)
c) P is included, but not at the beginning, and M is excluded?
4Words
in placed becan Ppositionsofnumber the
46 P ROBLES
dsletter wor 4many howbecomesnowQuestion
1440
(ii) Six people are in a boat with eight seats, for on each side.What is the probability that Bill and Ted are on the left side and Greg is on the right?
68 ns)restrictio (no Ways P20160
24 ons)(restricti Ways P
gocan Ted & BillWays
14P 3
5P
gocan GregWays
gocan peopleremainingWays
2880
201602880rightG left, T&B P
71
![Page 98: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/98.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
![Page 99: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/99.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
![Page 100: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/100.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P
![Page 101: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/101.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
![Page 102: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/102.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
![Page 103: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/103.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
![Page 104: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/104.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P 20
![Page 105: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/105.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
![Page 106: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/106.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
![Page 107: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/107.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
45 Towersblock 4 P
![Page 108: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/108.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
45 Towersblock 4 P 120
![Page 109: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/109.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
45 Towersblock 4 P 120
55 Towersblock 5 P
![Page 110: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/110.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
45 Towersblock 4 P 120
55 Towersblock 5 P 120
![Page 111: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/111.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
45 Towersblock 4 P 120
55 Towersblock 5 P 120
320Towersofnumber Total
![Page 112: 11X1 T05 01 permutations I (2011)](https://reader033.vdocument.in/reader033/viewer/2022051414/559e33c01a28abe25d8b462a/html5/thumbnails/112.jpg)
Sophia has five coloured blocks: one red, one blue, one green, one yellow and one white.
She stacks two, three, four or five blocks on top of one another to form a vertical tower.
2006 Extension 1 HSC Q3c)
(i) How many different towers are there that she could form that are three blocks high?
35 Towers P60
(ii) How many different towers can she form in total?
25 Towersblock 2 P
35 Towersblock 3 P
20
60
45 Towersblock 4 P 120
55 Towersblock 5 P 120
320Towersofnumber Total
Exercise 10E; odd (not 39)