Question: For the network shown below and the given time estimates, what is the estimated variance in the time for activity D? A Start End B

For the network shown below and the given time estimates, what is the estimated variance in the time for activity D? A Start End B D a Time estimates Expected Variance Activity Optimistic Most Likely Pessimistic Time (ET) (6) m b A 31 40 49 B 44 50 56 C 48 60 72 D 22 34 31 9 days 33 days 16 days 4 days

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