Answer:
38.33 days
Explanation:
The PERT method is a common method used to determine the weighted mean or average of three different values of a parameter to calculate a final estimate. Therefore, in the question shown above, the PERT duration can be estimated as:
PERT duration = (20+4*40+50)/6 = (20+160+50)/6 = 38.33 days.
Thus, for the given activity, the PERT duration is approximately 38.33 days.