What is the variance of the time between arrivals

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Cars arrive at Carla's Muffler shop for repair work at an average of 3 per hour, following an exponential distribution.
(a) What is the expected time between arrivals?
(b) What is the variance of the time between arrivals?

Reference no: EM13177089

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What is the variance of the time between arrivals : Cars arrive at Carla's Muffler shop for repair work at an average of 3 per hour, following an exponential distribution. (a) What is the expected time between arrivals? (b) What is the variance of the time between arrivals?

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