What is the expected time until 4th failure

Reference no: EM1316573

Determine Probability using exponential distribution.

The average time between failures of a laser machine is exponentially distributed with the mean of 40,000 hours.

a) What is the expected time until 4th failure?

b) What is the probability that the time to the 5th failure is greater than 80,000 hours?

Reference no: EM1316573

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