An Activity on a PERT Network Has These Time Estimates

Multiple Choice

An activity on a PERT network has these time estimates: optimistic = 2, most likely = 3, and pessimistic = 8. Its expected time and variance (if it is a critical activity) are

A) 3.67; 1
B) 3.67; 6
C) 4.33; 1
D) 4.33; 6
E) none of these