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The registration office has only one staff serving customers. On average, the staff serves a customer for 3 minutes, and the processing time has a

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The registration office has only one staff serving customers. On average, the staff serves a customer for 3 minutes, and the processing time has a standard deviation of 1.6 minutes. The arrival rate is 15 customers per hour, and the coefficient of variation of the arrival process is 0.4 . What is the average waiting time for a customer? 2 2.25 2.67 32

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