PMI Project Management Professional Practice Question

The correct answer is 16.33 days. In Three-Point Estimation, the expected duration (TE) is calculated using the formula: TE = (Optimistic + 4 x Most Likely + Pessimistic) / 6. Plugging in the values from the question:

TE = (10 + 4 x 15 + 28) / 6 TE = (10 + 60 + 28) / 6 TE = 98 / 6 TE = 16.33 days

This formula gives more weight to the most likely estimate, which is typically the most accurate. The optimistic and pessimistic estimates help account for uncertainty and potential risks in the activity duration. It's important to note that this method provides a more realistic estimate than simply using the most likely estimate alone, as it considers both best-case and worst-case scenarios.