Suppose small aircraft arrive at a certain airport

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Suppose small aircraft arrive at a certain airport according to a Poisson process. The mean time between arrivals of small aircrafts is 0.25 hour.

PART A: How many aircrafts can be expected to arrive during 2-hour period?

PART B: What is the probability that AT LEAST twelve arrivals occur during 2-hour period?

Reference no: EM13642731

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