A telephone exchange can handle at most 20 simultaneous conversations. It hasbeen

Chapter 4, Problem 4

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A telephone exchange can handle at most 20 simultaneous conversations. It hasbeen observed that an incoming call finds an all busy signal 1% of the time.Assuming that the number of incoming calls, X, per unit time has a Poissondistribution, find the parameter (or the average call arrival rate) of the distri-bution.

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