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The arrival time of an elevator in a 12-story dormitory is equally likely at any time...

The arrival time of an elevator in a 12-story dormitory is equally likely at any time range during the next 3.5 minutes.

A.) Calculate the expected arrival time.

B.) What is the probability the elevator arrives in less than .4 minutes.

C.) What is the probability the elevator arrives in more than .4 minutes.

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