Question: Consider the queueing system for the walk-in services of a post office. Customer arrive at an average rate of 10 per hour. Customers join a

Consider the queueing system for the walk-in services of a post office. Customer arrive at an average rate of 10 per hour. Customers join a single queue and get served by one of 4 available servers. The average service time is 20 minutes per customers. The customers get served first-come-first-served (FCFS). What is the average time (in minutes) between two consecutive arrivals?

10 minutes

6 minutes

20 minutes

39.73 minutes

Cannot be computed with the available information

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