cons30 s probability predictions

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