Question: 57. Suppose that a random variable X is distributed as an exponential with mean 20. Find the following probabilities: (a) P(X >25) (b) P(15 <

57. Suppose that a random variable X is distributed as an exponential with mean 20.

Find the following probabilities:

(a) P(X >25)

(b) P(15 < X < 25)

(c) P(X ≥ 20)

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