Verified Answer :

olemakpadu

Since they are disjointed it means, nothing is common between A and B.

That is the probability of A and B occurring at the same time is zero.

Therefore :

P(A or B) = P(A)  + P(B).

That is the answer.

I hope this helps.

Solutions 

⇒ Disjointed

Two sets A and B are disjoint if they have no elements in common.  In other words the intersection is empty, A∩B=∅A∩B=∅.

There is nothing in common between A and B.

P(A or B) = P(A)  + P(B).

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