It belongs to Statistics

Toll booths on the Suwon are often congest because of the large number of cars waiting to pay. A consultant working for the state concluded that if service times are measured from the time a car stop in line until it leaves, service time are exponentially distributed with mean of 2.7 min. what proportion of cars can get through the toll booth in less than 3min? A uniformly distributed random variable has minimum and maximum value of 20 and 60. A. Find P(x>25) 8. Find P(25