Hi,

I have got this below question from one of the mock test.I am not able to get the calculation.

Given that completion time of a particular project has an expected value of 8 weeks and a standard deviation of two weeks ,and assuming that completion time is normally distributed,what is the probability of completing the project within 10 weeks

A.0.5
B.0.84
C.0.95
D.0.997

Please let me know the explanation