An advertising project manager developed the network diagram shown below for a new advertising campagign. In addition, the manager gathered the time information for each activity, as shown in the below table.
Estimate the probability that the noncritical path B-F-G will take more than 20 weeks. Hint: Subtract from 1.0 the probability that B-F-G will take less than 20 weeks.
Activity Optimistic Most likely Pessimistic Immediate Predecessor(s)
A 1 4 7 -
B 2 6 7 -
C 3 3 6 B
D 6 13 14 A
E 3 6 12 A,C
F 6 8 16 B
G 1 5 6 E,F