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Suppose that the time students wait for a bus can be described by a uniform random variable X , where X is between 15 minutes

Suppose that the time students wait for a bus can be described by a uniform random variable X, where X is between 15 minutes and 25 minutes. (a) What is the probability, P that a student will wait between 15 and 21 minutes for the next bus? (b) What is the probability, P that a student will have to wait at least 21 minutes for the next bus?

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