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Let X be the amount of time (in minutes) a postal clerk spends with his or her customer. Assume that X has an exponential distribution
Let X be the amount of time (in minutes) a postal clerk spends with his or her customer. Assume that X has an exponential distribution and that the expectation is: E(X) = 5 minutes (meaning the expected amount of time spent with a customer is 5 minutes). The next 3 questions refer to this waiting time.
The probability that a clerk spends MORE than 10 minutes with a customer is:
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