What are the mean and variance of the waiting times

Reference no: EM131025624

Suppose that customers arrive at a checkout counter at a rate of two per minute.

a What are the mean and variance of the waiting times between successive customer arrivals?

b If a clerk takes three minutes to serve the first customer arriving at the counter, what is the probability that at least one more customer will be waiting when the service to the first customer is completed?

Reference no: EM131025624

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