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The time it takes to completely tune an engine of an automobile Y follows an exponential distribution with a mean of 45 minutes. Please answer

The time it takes to completely tune an engine of an automobile Y follows an exponential distribution with a mean of 45 minutes. Please answer the following questions.

What is the probability of tuning an engine in 36 minutes or less?

What is the probability of tuning an engine between 36 and 63 minutes?

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