If the path A-B-E-F-G has a total duration of 17 days, what is the value of E?

If the path A-B-E-F-G has a total duration of 17 days, what is the value of E?

• A. 2 days
• B. 3 days
• C. 4 days
• D. 5 days

Answer: (B)

The total duration along a path is the sum of all activities on that path. For the path A-B-E-F-G, the total is A + B + E + F + G, which is given as 17 days. The durations of the other activities on this path—A, B, F, and G—add up to 14 days. To reach the total of 17 days, E must be 17 − 14 = 3 days. So the value of E is 3 days. If E were any other value, the path total would differ from 17 days.

The total duration along a path is the sum of all activities on that path. For the path A-B-E-F-G, the total is A + B + E + F + G, which is given as 17 days. The durations of the other activities on this path—A, B, F, and G—add up to 14 days. To reach the total of 17 days, E must be 17 − 14 = 3 days. So the value of E is 3 days. If E were any other value, the path total would differ from 17 days.