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Cars arrive at Carlas Muffler shop for repair work at an average of 3 per hour, following an exponential distribution. Using Microsoft Excel (a) What

Cars arrive at Carlas Muffler shop for repair work at an average of 3 per hour, following an exponential distribution.

Using Microsoft Excel

(a) What is the expected time between arrivals?

(b) What is the variance of the time between arrivls

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