Addition rule for two events

Rarely Tested

$$P(A \cup B) = P(A) + P(B) - P(A \cap B)$$

Probability of union of events $$A$$ and $$B$$. If $$A$$ and $$B$$ are mutually exclusive, $$P(A \cap B) = 0$$.

No related questions available for this formula yet.

Go back to topics

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.