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May 22, 2015

Homework Help: statistics

Posted by nounou on Friday, July 16, 2010 at 4:48pm.

The time it takes to give a man a shampoo and haircut is normally distributed with a mean of 22 minutes and standard deviation of 3 minutes. Customers are scheduled every 30 minutes. (a) What is the probability that a male customer will take longer than the allocated time? *(b) If three customers are scheduled sequentially on the half hour, what is the probability that all three will be finished withintheir allocated half-hours time?

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