The time between arrivals of customers at the drive-up window of a bank follows an exponential probability distribution with a mean of 10 minutes. (Round your answers to four decimal places.) (a) What is the probability that the arrival time between customers will be 8 minutes or less? (b) What is the probability that the arrival time between customers will be between 4 and 8 minutes?
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In this case, the mean is 10 minutes, so λ = 1/10 = 0.1. Show more…
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