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A certain type of device has an advertised failure rate of 0.01 per hour. The failure...

A certain type of device has an advertised failure rate of 0.01 per hour. The failure rate is constant and the exponential distribution applies.

a) What is the mean time to failure?

b) What is the probability that 200 hours will pass before a failure is observed?

math   Statistics-And-Probability   
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