The probability density function of the time you arrive

at a terminal (in minutes after 8:00 a. M. ) is f (x) = 0. 1 exp(− 0. 1x)

for 0 < x. Determine the probability that

(a) You arrive by 9:00 a. M. (b) You arrive between 8:15 a. M. And 8:30 a. M. (c) You arrive before 8:40 a. M. On two or more days of five

days. Assume that your arrival times on different days are

independent