Hello everyone.

I have an exam in a couple of days, and i came across some basics that i have completely forgotten ..

The question is:

Two events, A and B, from a given event space, are such that Pr(A) = 1/5 and Pr(B) = 1/3.

1. Calculate Pr(A' intersection B) when Pr(A intersection B) = 1/8

I've worked this out, and got 5/24

2. Calculate Pr(A' intersection B) when A and B are mutually exclusive.

Im not quite sure how to approach this one

Any help would be appreciated.