At an ATM machine in a supermarket, the average length of a transaction is two minutes, and

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At an ATM machine in a supermarket, the average length of a transaction is two minutes, and on average, customers arrive to use the machine once every five minutes. How long is the average time that a person must spend waiting and using the machine? What is the 90th percentile of residence time? On average, how many people are waiting to use the machine? Assume M/M/1.

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The average time a person must spend waiting and using the machine is seven minutes The 90th percent...View the full answer

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