In a factory, machines breakdown at an average of 6 machines per hour according to a poisson distribution. The time a repair person takes to repair th

In a factory, machines breakdown at an average of 6 machines per hour according to a poisson distribution. The time a repair person takes to repair the machine is not defined by any probability distribution but has a mean of 8 minutes and a standard deviation of 3 minutes.On average, how many machines are in the system either being repaired or waiting in line to be repaired?

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