The time in (seconds) that it takes a librarian to locate an entry in a file of records on checked-out books has an exponential distribution of lambda = .05.  In the long run, what proportion of the time will you have to wait more than the average wait time?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter5: Exponential And Logarithmic Functions
Section5.5: Exponential And Logarithmic Models
Problem 4ECP
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The time in (seconds) that it takes a librarian to locate an entry in a file of records on checked-out books has an exponential distribution of lambda = .05.  In the long run, what proportion of the time will you have to wait more than the average wait time?

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