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Statement of a problem № m1065

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The lifetime of plasma and LCD TV sets follows an exponential distribution with a mean of 100,000 hours. Compute the probability a television set: a. Fails in less than 10,000 hours. b. Lasts more than 120,000 hours. c. Fails between 60,000 and 100,000 hours of use. d. Find the 90th percentile. So 10% of the TV sets last more than what length of time?

Solution:
The lifetime of plasma and LCD TV sets follows an exponential distribution with

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