Lecture 15 (Discrete Math)

For any two events A and B, the lecture proves that P(A ∪ B) equals:

1. A.P(A) + P(B)
2. B.P(A) + P(B) − P(A ∩ B)
3. C.P(A) + P(B) + P(A ∩ B)
4. D.P(A) · P(B)