The useful life of a particular type of printer is measured by a random variable X with

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The useful life of a particular type of printer is measured by a random variable X with probability density function


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where x denotes the number of months a randomly selected printer has been in use.


a. What is the probability that a randomly selected printer will last between 10 and 15 months?


b. What is the probability that a randomly selected printer will last less than 8 months?


c. What is the probability that a randomly selected printer will last longer than 1 year? 


d. What is the expected life of a randomly selected printer?

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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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