00:01
Hello students, from the question here, they given that activity, expected activity time, variance and critical path n for some days.
00:13
Now here we need to find the probability that the project will take less than 80 days.
00:18
So x is equal to project completion needed which is equal to 80.
00:31
Here from the given data, the critical path which is for s is equal to a, b, then d and then g and h.
00:50
Now the expected duration of critical path which is equal to 16 plus 20 plus 10 plus 16 plus 12.
01:15
By summing these we get 74.
01:18
This is our mean mu.
01:21
Now the variance of the critical which is equal to 1 .7 plus 2 .3 plus 1 .8 plus 1 .1 plus 2 .1.
01:36
The sigma square is equal to 9.
01:38
So the standard deviation sigma which is equal to 3...