Find probability that an arriving unit does not have to wait

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Reference no: EM13277324

the arrival rat of cars at a toll plaza is 50 cars per hours. There are three boothes serving an a verage of 20 cars per hour. Assume an exponential for service time and a poisson distribution for arrival time.
1. find the probablity of no car in the plaza
2. find the probability that an arriving unit does not have to wait.

Reference no: EM13277324

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