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A small grocery store has only one checked out counter.customers arrive at this checkout counter at...

A small grocery store has only one checked out counter.customers arrive at this checkout counter at random from 1 to 8 minutes apart.each possible value of inter arrival time has the same probablity of occurence.the services time vary from 1 to 6 minutes with certain probablity of occurences.to estimate the problem for 20 customers,describe the components to estimate the server utilization.

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