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1. A waiting line problem has an average of 80 arrivals per eight hour day. Suppose there is a single server and the average
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The answer is 10 per hour.Two important issues relevant to a queue involve the timing and types of arrivals. Usually, the timing of arrivals is described by specifying the average rate of arrivals per unit of time (a), or the average interarrival time (1/a).

hence 80 per eight hour here 1/a = 80/8 per hour means 10 per hour.

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