PERT is being used to schedule a project. For a given activity, the optimistic time is 17 days, pessimistic is 47 days and the most likely time is 29 days. What is the expected activity time? A) 31 days B) 30 days C) 29 days D) none of the above PERT is being used to schedule a project. For a given activity, the optimistic time is 17 days, pessimistic is 47 days and the most likely time is 29 days. What is the expected activity time? A) 31 days B) 30 days C) 29 days D) none of the above