Question: An activity on a PERT network has these time estimates: optimistic = 2, most likely = 3, and pessimistic = 10. What is its expected

An activity on a PERT network has these time estimates: optimistic = 2, most likely = 3, and pessimistic = 10. What is its expected activity time and variance?

A. 4; 10.67

B. 5; 10.67

C. 5; 1.78

D. 4; 1.78

E. None of the Above

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