A system's repair time needs to be evaluated with respect to the requirement, t_0.95= 2.9

The sum of the

-trouble shoot time, T1,

-remove and replace time, T2, and

-verification time, T3.

1.If the task times are independent and are distributed as follows:

T1 ~ N (0.75, 0.2)

T2 ~ N (1.25, 0.3)

T3 ~ N (0.5, 0.15)

What is the probability of exceeding t_0.95= 2.9 hours?

2.If the task times are independent and distributed as follow:

T1 ~ E (0.75)

T2 ~ LN (0.5, 0.1)

T3 ~ N (0.5, 0.15)

What is the probability of exceeding t_0.95= 2.9 hours?

\f\f\f