The arrival rate of patients at a hospital counter follows Poisson distribution with a mean of 25 per hour. The service rate of the treatment to patients also follows Poisson distribution with a mean of 45 per hour. What is the probability of having 10 patients in the system

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A:

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A:

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Q: he number of accidents that occur at a busy intersection is Poisson distributed with a mean of 4.2…

A: X~Pois(4.2)