Question: A post office clerk operates with 75% utilization. The coefficient of variation for the service process is 0.6 and the coefficient of variation of the

A post office clerk operates with 75% utilization. The coefficient of variation for the service process is 0.6 and the coefficient of variation of the arrival process is 0.9. The average processing time is 4 minutes. What is the average time a customer waits in the queue according to the single-server queue model

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