Potential customers arrive at a full-service, one-pump gas station at a Poisson rate of 20 cars per
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Potential customers arrive at a full-service, one-pump gas station at a Poisson rate of 20 cars per hour. However, customers will only enter the station for gas if there are no more than two cars (including the one currently being attended to) at the pump. Suppose the amount of time required to service a car is exponentially distributed with a mean of five minutes.
(a) What fraction of the attendant's time will be spent servicing cars?
(b) What fraction of potential customers are lost?
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