Question

The optimistic, most likely, and pessimistic estimates of time for an activity are 4 days, 11 days and 12 days respectively. The expected completion time of this activity is

A. 8 days B. 9 days C. 10 days D. 11 days

Answer 1

we use generally the following formula for calculation of the expected completion time :
     1/6 * (Optimistic estimate + pessimistic estimate + 4 * most likely estimate)
 So we have : 1/6 (4+12 + 4* 11) = 60/6 = 10 days

Answer 2

The optimistic, most likely, and pessimistic estimates of time for an activity are 4 days, 11 days and 12 days respectively. The expected completion timeof this activity is C. 10 days