Consider three events A B and C in a sample space S Is the f

Consider three events A, B, and C in a sample space S. Is the following true or false?
Pr A B C = Pr(A) + Pr(B) Pr(C).
(a) True
(b) False
(c) None of the above.

Please explain briefly?

Solution

b) False; because A,B and C are not mutully exclusive