Q29 of 43 Page 296

If M and N are any two events, the probability that at least one of them occurs is

Given that M and N are two events,

By General Addition Rule,


P(A ⋃ B) = P(A) + P (B) – P(A ⋂ B)


∴ P(M ⋃ N) = P(M) + P(N) – P(M ⋂ N).


Hence, the correct option is (B).

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