Question: 37. A PERT network has three activities on critical path with mean time 3,8 and 6 and standard deviations 1,2 and 2 respectively. The probability

37. A PERT network has three activities on critical path with mean time 3,8 and 6 and standard deviations 1,2 and 2 respectively. The probability that the project will be completed in 20 days is: frob. A. 0.50 B. 0.66 C. 0.84 D. 0.95

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