Changes in airport procedures require considerable planning. Arrival rates of aircraft are important factors that must be taken into account. Suppose small aircraft arrive at a certain airport, according to a Poisson process, at the rate of 6 per hour. Thus, the Poisson parameter for arrivals over a period of hours is λ =6t. (i) What is the probability that exactly 4 small aircraft arrive during a 1-hour period? (ii) What is the probability

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