Problem on exponential distribution with a mean service


Question: Response time at an online site can be modeled with an exponential distribution with a mean service of 5 minutes. John knows this and it is not sure to wait for an answer. What is the probability that for the reply to John's request.

(a) Will take longer than 10 minutes?

(b) Shorter than 10 minutes?

(c) If the mean service is now 2 minutes, what is the probability that it takes longer than 10 minutes?

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Basic Statistics: Problem on exponential distribution with a mean service
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