Question: at an information booth with one server, during peak hours customers arrive according to a Poisson distibution with an average rate of 25 customers per

at an information booth with one server, during peak hours customers arrive according to a Poisson distibution with an average rate of 25 customers per hour. Service time is random with an average of 2.0 minutes and a standard deviation of 1 minute. Determine the average time spent in line.

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