*/*_If an activity has its optimistic, most likely and pessimistic times as 2, 3 and 7 respectively, then its expected time and variance are respectively?

*/*_If an activity has its optimistic, most likely and pessimistic tim

1.	/_If an activity has its optimistic, most likely and pessimistic times as 2, 3 and 7 respectively, then its expected time and variance are respectively?
A.	3.5 and 5/6
B.	5 and 25/36
C.	3.5 and 25/36
D.	4 and 5/6
Answer» D. 4 and 5/6