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Unformatted text preview: (from formula sheet). (a) P(X > 1) = exp(- x) = exp(-[1/1.5]1) = exp(-2/3) = 0.5134. (b) If you did not receive a message in the last four hours what is the probability that your do not receive a message in the next hour?(4 pts) (b) P(X > 5/ X > 4) = (by loss of memory property) = P(X > 1) = 0.5134 (from (a) above). (c) What is the expected time between your fourth and fifth message? (2 pts) Same as E(X) = 1.5 hours....
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- Spring '08