Question: Please explain each step A rail commuter buys a ticket every morning and notes that on average he has to wait in a qucuc 3

Please explain each step A rail commuter buys a

Please explain each step

A rail commuter buys a ticket every morning and notes that on average he has to wait in a qucuc 3 days out of 5. He also finds that the average time to be served when he reaches the head of the queue is 20 seconds. Treating the system as a simple qucue and assuming that the figures are the same for other passengers, find: (a) the average number of customers in the queue fincluding -occasions when thc qucuc length is-zero); (b) the average time in the system

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