Question: ID PERT 1 A contractor's project being analyzed by PERT has an estimated time for the critical path of 1 2 0 days. The sum

ID PERT1A contractor's project being analyzed by PERT has an estimated time for the critical path of 120 days. The sum of all activity variances is 81; the sum of variances along the critical path is 64. What is the probability that the project will take 130 or more days to complete?

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