UPSC Civil Service Exam Questions - Engineering

Q1:

The optimistic, most likely, and pessimistic estimates of time for an activity are 4 days, 11 days and 12 days respectively. The expected completion time of this activity is

A 8 days

B 9 days

C 10 days

D 11 days

ANS:C - 10 days

Po+Pp+4Tm/6.

= 4+12+4*11/6.
= 10 days.