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The number of car arrivals at a car petrol station is Poisson distribution with mean of 14.5 cars per hour during the off-peak period. (i)

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The number of car arrivals at a car petrol station is Poisson distribution with mean of 14.5 cars per hour during the off-peak period. (i) What is the probability that exactly 14 cars will arrive at the petrol station in one particular hour of the off peak period? (ii) What is the probability that between 20 and 23 cars (inclusive) will arrive at the petrol station during the two hour off peak period? (lii) Within a three-hour off-peak period, what is the probability that exactly 10 cars will arrive in the first hour, exactly 12 cars will arrive in the second hour, and exactly 14 cars will arrive in the third hour

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