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The time it takes a mechanic to change the oil in a car is exponentially distributed with a mean of 5 minutes. What is the

The time it takes a mechanic to change the oil in a car is exponentially distributed with a mean of 5 minutes.

What is the probability that it will take a mechanic between 3 and 5 minutes to change the oil?

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,1809

.6988

.3935

.1959

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