Question

The mileage (in thousands of miles) which car owners get with a certain kind of tire is a random variable with the following pdf

f(x) = (1/20)e^(-x/20) when x>0 and f(x) = 0 otherwise.

A. Name this distribution. Make sure you give its parameter(s).

B. What is the probability that a tire of this kind would last i. at most 10,000 miles? ii. anywhere from 16,000 to 24,000 miles? iii. at least 30,000 miles?

Answer 1