A project has activities A, B, C, D as its critical activities with A ->B -> C-> D as its critical path. The expected values and variances of activities A, B, C, D in weeks are:

A (exp value =15 , var = 3 );

B (exp value =14 , var = 3 );

C (exp value =10 , var = 2 );

D (exp value =10 , var = 1 ).

The probability that this project can be completed in 50 weeks lies in this range:

Select one:

0% to 34%

35% to 40%

60% to 65%

82% to 87%

93% to 96%

97% to 100%