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1. Customer arrivals at a bank are random and independent; the probability of an arrival in any one minute is the same as the probability

1. Customer arrivals at a bank are random and independent; the probability of an arrival in any one minute is the same as the probability of an arrival in any other one minute. Answer the following questions assuming that the average arrival rate is four customers within two minutes. to. What is the probability of exactly three arrivals in one minute? b. What is the probability of at least three arrivals in one minute?

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