tJ * You may need to use the appropriate appendix table or technology to answer this question. A university found that 20% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course. (Round your answers to four decimal places.) (a) Compute the probability that 2 or fewer will withdraw. H (b) Compute the probability that exactly 4 will withdraw. H (c) Compute the probability that more than 3 will withdraw. H (d) Compute the expected number of withdrawals. H 8. [44.54 Points] DETAILS ASWSBE14 5.E.047. You may need to use the appropriate appendix table or technology to answer this question. Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. (a) What is the expected number of calls in one hour? H (b) What is the probability of three calls in five minutes? (Round your answer to four decimal places.) H (c) What is the probability of no calls in a five-minute period? (Round your answer to four decimal places.) H You may need to use the appropriate appendix table or technology to answer this question. Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. The mean arrival rate is 10 passengers per minute. (Round your answers to six decimal places.) (a) Compute the probability of no arrivals in a one-minute period. H (b) Compute the probability that three or fewer passengers arrive in a one-minute period. U (c) Compute the probability of no arrivals in a Zlesecond period. H (d) Compute the probability of at least one arrival in a Zlesecond period. U