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Two repairmen are hired for attending 8 machines in a workshop. Assume that machines break down according to a Poisson distribution with mean 4 per

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Two repairmen are hired for attending 8 machines in a workshop. Assume that machines break down according to a Poisson distribution with mean 4 per hour and that the repair time is exponentially distributed. Suppose each repairman can repair 6 machines per hour. Find the probability that the two repairmen are idle and the probability that one repairman is idle? 2. What is the expected number of idle machines not being serviced

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