Airline passengers arrive randomly and independently at the passenger- screening facility at Ottawa international airport. The mean arrival rate is 10 pas- sengers per minute. Assume that the arriving process follows a Poisson distribution.  a) What is the probability of no arrivals in a one-minute period?  b) What is the probability that three or fewer passengers arrive in a oneminute period? c) What is the probability of three or more passengers arrival in a 15- second period?

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