The time between arrivals of customers at an automatic telle…
The time between arrivals of customers at an automatic teller machine is an exponential random variable with a mean of 10 minutes. The ATM has just opened. X is the time until the 5th customer arrives at the ATM. Determine the probability that the 5th customer’s arrival is after the ATM has been open for 12 minutes. Express your answer to four decimal places.
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