unit 4 section 4-5. 4-5: counting rules to determine the number of possible outcomes for a sequence...
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Unit 4Section 4-5
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4-5: Counting Rules To determine the number of possible outcomes for a
sequence of events we use one of three counting rules:
Fundamental Counting Rule
Permutation Rule
Combination Rule
Fundamental Counting Rule: In a sequence of n events in which the first one has k1 possibilities, the second one has k2 possibilities, and so forth…the total number of possibilities will be
k1 * k2 * k3 *…kn
(Multiply the possibilities)
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Example 1: A coin is tossed and a die is rolled. Draw a tree diagram
to represent the total number of outcomes. Verify your findings using the fundamental counting rule.
Example 2: A paint manufacturer wishes to manufacture several
different paints. The categories include:
Color: red, blue, white, black, green, brown, yellow
Type: latex, oil
Texture: Flat, semigloss, high gloss
Use: Indoor, outdoor
How many different kinds of paint can be made if a person can select one color, one type, one texture, and one use?
Section 4-5
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Example 3: The digits 0, 1, 2, 3, and 4 are to
be used in a four-digit ID card. How many different cards are possible if repetitions are permitted?
Section 4-5
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Factorial Notation – uses an ! as its notation.
5! Means 5 * 4 * 3 * 2 * 1 Special Definition: 0! = 1
Example 4: Simplify 2! 4! (5 – 2)! 5! – 2 3! + 5!
Section 4-5
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Homework: Pg 220 – 221: 1 – 12, 13 c, d, h, i
Section 4-5