Question

The time to failure (in hours) of fans in a personal computer can be modeled by an exponential distribution with . Round your answers to 4 decimal places. (a) What proportion of fans will last at least 9000 hours?

Answer 1

Explanation:

Assuming the decay factor, m = 0.0005

f(x) =
`1 - e^(-mx)`

f(9000) =
`1 - e^(-0.0005*9000)` = 1 - 0.0111 = 0.99