Mining Engineering > GATE 2017 > Project Management
In a PERT network, the "time estimates" of an activity are the following: Optimistic time - 2 days, Most likely time - 4 days, and Pessimistic time - 12 days. The expected time and standard deviation of the activity in days are respectively
A
6.0 and 2.78
B
5.0 and 1.66
C
6.0 and 1.66
D
5.0 and 2.78

Correct : b

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