Question: 7. PERT uses three time estimates because: (a) Three time estimates are more accurate than one time estimates. (b) The activity duration is known with

7. PERT uses three time estimates because:

(a) Three time estimates are more accurate than one time estimates.

(b) The activity duration is known with certainty.

(c) The project has been done so many times that there is variability in duration of activities.

(d) The duration of activities is probabilistic.

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