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show an answer and step by step solution A petrol station has one pump. Vehicles arrive at the petrol station according to Poisson input process

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A petrol station has one pump. Vehicles arrive at the petrol station according to Poisson input process at an average 12 per hour. The service time follows exponential distribution with a mean of 4 minutes. The pump is expected to be idle for a. 4/5 b. 3/5 c. 6/5 d. 5/3

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