If A and B are "mutually exclusive" events, then P(A+ B)= P(A)+ P(B). Since P(A+B) cannot be larger than 1, neither can P(A)+ P(B).I have read a question which has
Two events A and B such that p(A) = r and p(B) = s with r,s >0 and
r + s > 1
My querry is about r + s > 1 is this possible ? I thought that it had to be < or = to 1
regards
Brendan
Don't you mean:Note however, that though p(A) + p(B) > 1, you always have p(A + B) <= 1 (with p(A + B) being the probability of A or B happening).