For an activity,the optimistic,most likely
问题:
For an activity,the optimistic,most likely and pessimistic estimates are 12,16 and 18 respectively.Which of the following statement is correct ?()
A.There is 68.26% chance that the activity will be completed in 15 to 17 day
B.There is 95.44% chance that the activity will be completed in 15 to 17 day
C.There is 68.26% chance that the activity will be completed in 14.67 to 16.67 day
D.There is 93.73% chance that the activity will be completed in 15 to 17 day