297. The lifetime of a machine part has ..-阿摩線上測驗
297. The lifetime of a machine part has a continuous distribution on the interval (0, 40) with
probability density function f, where f (x) is proportional to .
Calculate the probability that the lifetime of the machine part is less than five.
(A) 0.03
(B) 0.13
(C) 0.42
(D) 0.58
(E) 0.97