Estimated time 
and variance of the activities ‘V’ on the critical path in a PERT network are given in the following table
|
Activity
|
|
V (days)
|
|
A
|
17
|
4
|
|
B
|
15
|
4
|
|
G
|
8
|
1
|
The probability completing the project in 43 days is
(a) 15.6% (b) 50.0%
(c) 81.4% (d) 90.0%