Question: please explain how and show all work 18. Three paths of a PERT network have these mean durations and variances in weeks: Mean Duration Variance

please explain how and show all work 18. Three

please explain how and show all work

18. Three paths of a PERT network have these mean durations and variances in weeks: Mean Duration Variance (EV) Path (Et.) 2 - 65 64 66 2.85 5.40 1.50 Which path offers the greatest risk of overrunning a contract deadline of 69 weeks

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