cons30 s probability predictions
TRANSCRIPT
MAKING PREDICTIONS USING
PROBABILITY
0 0.25 0.5 0.75 1
0% 25% 50% 75% 100%never less
likelyequal chance
verylikely
always
PROBABILITY SCALE
TOSSING A COIN:
P( ) = 0%
P( ) = 50%
P( ) = 100%
ROLLING A PAIR OF DICE:
P( ) = 0%
P( ) = 50%
P( ) = 100%
EX There is a 1 in 5 chance that someone will be born with blonde hair. Out of a group of 250 random people, how many are expected to have blonde hair?
EX In a carton of a dozen eggs, one is expected to be broken every time. How many would you expect to be broken in a case of 216 eggs?
EX A store is giving away 15 free ipods today. They have given away 7 already. If you walk in the store and there are 480 people left in the store, what is your percent chance of getting a free one?
HOMEWORK:p.331; #18
BONUS CHALLENGE:5 BONUS MARKS ON UNIT TEST!!!!
What is your probability of winning the jackpot?This means with one ticket, what are your chances (as a reduced fraction) of getting all six numbers correct?
* * * * *1st # 2nd # 3rd # 4th # 5th # 6th #
* You select any 6 numbers from the numbers 1 through 49.* Six numbers are then drawn one by one out of a machine. * Find the probability of drawing each number, one by one, separately then multiply all of them together to get one fraction, which you can reduce to....1 out of ?.
* * * * *1st # 2nd # 3rd # 4th # 5th # 6th #
SOLUTION