Suppose the time X a customer must spend waiting in line at a certain bank is a

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Suppose the time X a customer must spend waiting in line at a certain bank is a random variable that is exponentially distributed with density function


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where x is the number of minutes a randomly selected customer spends waiting in line.


a. Find the probability that a customer will have to stand in line at least 8 minutes.


b. Find the probability that a customer will have to stand in line between 1 and 5 minutes.


c. Find the expected waiting time for customers at the bank.

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Calculus For Business, Economics And The Social And Life Sciences

ISBN: 9780073532387

11th Brief Edition

Authors: Laurence Hoffmann, Gerald Bradley, David Sobecki, Michael Price

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