Bank after the other two customers leave

Reference no: EM131828538

Three customers A, B, and C simultaneously arrive at a bank with two tellers on duty. The two tellers were idle when the three customers arrived, and A goes directly to one teller, B goes to the other teller, and C waits until either A or B leaves before she can begin receiving service. If the service times provided by the tellers are exponentially distributed with a mean of 4 minutes, what is the probability that customer A is still in the bank after the other two customers leave?

Reference no: EM131828538

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