Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. The m
ean arrival rate is 10 passengers per minute. 1. Compute the probability of no arrivals in a one-minute period. 2. Compute the probability that three or fewer passengers arrive in a one-minute period. 3. Compute the probability of no arrivals in a 15-second period. 4. Compute the probability of at least one arrival in a 15-second period.