A

For a particular clothing store, a marketing firm finds that 25% of $10-off coupons delivered by mail are redeemed. Suppose 40 customers are randomly selected and are mailed $10-off coupons. What is the probability that no more than four of the customers redeems the coupon?

Multiple Choice

0.9953

0.0113

0.0160

B

A bank manager estimates that an average of one customers enter the tellers' queue every fifteen minutes. Assume that the number of customers that enter the tellers' queue is Poisson distributed. What is the probability that exactly eight customers enter the queue in a randomly selected thirty-minute period?

Multiple Choice

0.0009

0.0002

0.9998

C

Cars arrive randomly at a tollbooth at a rate of 12 cars per 15 minutes during rush hour. What is the probability that more than eight cars will arrive over a five-minute interval during rush hour?

Multiple Choice

0.9786

0.0214

0.0298

0.0511