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Name: March 29, 2001 Score:

MATH 147

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Quiz 8

(4 pts.)

Problem 1. Circle T for a true statement, F for a false statement.

T F While blindfolded you decide to draw cans out a cooler, one at a time and with replacement, until you get a beer.(Root beer of course.) Each time, before drawing a can, your friend mixes up the cans in the cooler so that each draw is independent. There are 3 beers and 9 colas in the cooler. The binomial formula can

give the probability of drawing less than 4 times.

T F If a fair coin is flipped 5 times and shows a "heads" each time, the law of averages states that the 6^th flip is

more likely to be a "tails."

(6 pts.)

Problem 2. 5 tickets are drawn with replacement from the box shown. (B=Blue, R=Red)

a. How many ways can two blue tickets be drawn?

b. What is the probability of drawing less than three blue tickets from the box?