Question: Calls come into an office according to a Poisson process with 3 calls expected per hour. Suppose that the calls are answered independently, with the

Calls come into an office according to a Poisson process with 3 calls expected per hour.

Suppose that the calls are answered independently, with the probability that a call is answered as 3/4. Find the probability that exactly 4 calls are answered in a 1-hour period.

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