Ok, first post. So I have this question, which goes something like this... Given P(A)=0.3, P(B)=0.3, P(C)=0.7 P(AnB^c)=0.2, P(AnC^c)=0.2, P(AnBnC)=0 Find P((AnB)U(AnC)) (Where; n =intersect, U union, ^c = complement.) Personally my thoughts are.. P(AnBnC)=0. Therefore mutually exclusive. And then Because probability cannot be negative. I think that leads to P(AnB)=0,P(AnC)=0 & p(BnC)=0. Which couldnt be right, As that would give P((AnB)U(AnC)) = 0U0 = 0. My major concern is how do I change P(AnC^c) & P(AnB^c) to something useful! Thanks!