Quick Oil provides a single-channel automobile oil change and lubrication service. Customers provide an arrival rate of 4 cars per hour. The service rate is 5 cars per hour. Assume that arrivals follow a Poisson probability distribution and that service times follow an exponential probability distribution. a) What is the average number of cars in the system? b) What is the average time that a car waits for the oil and lubrication service to begin?

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Q: Use the data in the following table, which lists drive-thru order accuracy at popular fast food…

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