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UPSC Civil Service Exam Questions - Engineering

Q1:

In a PERT network, the activity durations are given as to (optimistic), tp (pessimistic) and tm (most likely time). What is the variance of is activity ?

A

B

C

D None of the above

ANS:C -

The right answer is C.

Option B is for the standard deviation.
Option A is for the expected time.