The number of people arriving for treatment at an emergency

The number of people arriving for treatment at an emergency room can be modeled by Poisson process with rate parameter of 5 per hour.

a) What is probability of that excatly 4 arrivals occur during a particular hour?

b) what is the probability that at least 4 arrivals occur during a particular hour?

c) how many people do you except to arrive during a 45 min. period?

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The number of people arriving for treatment at an emergency : the number of people arriving for treatment at an emergency room can be modeled by poisson process with rate parameter

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