Question: A small bank has two tellers, who are equally efficient and who are each capable of handling an average of 6 0 customer transactions per

A small bank has two tellers, who are equally efficient and who are each capable of handling an average of 60 customer transactions per hour, with the actual service times exponentially distributed. Customers arrive at the bank according to a Poisson process, at a mean rate of 100 per hour. What is the percentage increase in the length of time a customer should expect to spend at the bank if one of the tellers quit the job?

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