The lifetime (hours) of an electronic device is a random variable with the exponential probability density function:
Question:
f(x) = 1/50e-x/50 for x ≥ 0
a. What is the mean lifetime of the device?
b. What is the probability the device fails in the first 25 hours of operation?
c. What is the probability the device operates 100 or more hours before failure?
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a 50 hours b P...View the full answer
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Related Book For 
Quantitative Methods for Business
ISBN: 978-0324651751
11th Edition
Authors: David Anderson, Dennis Sweeney, Thomas Williams, Jeffrey cam
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