What is the probability that a repair time exceeds 2 hours

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The time required to repair a machine is an exponential random variable with rate λ = 0.5 downs/hour. (a) What is the probability that a repair time exceeds 2 hours? (b) What is the probability that the repair time will take at least 4 hours given that the repair man has been working on the machine for 3 hours?

Reference no: EM132581505

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