Current Attempt in Progress The number of messages that arrive at a Web site is a Poisson distributed random variable with a mean of 7 messages per hour. Round your answers to four decimal places (e.g. 98.7654). (a) What is the probability that 5 messages are received in 1 hour? (b) What is the probability that 10 messages are received in 1.5 hours? (c) What is the probability that fewer than 2 messages are received in 1/2 hour? (a) (b ) i (c) Statistical Tables and Charts eTextbook and Media Save for Later Attempts: 0 of 3 used Submit