- #1

Juwane

- 87

- 0

[tex]P( A \cup B) = P(A) + P(B) - P(A \cap B)[/tex]

This can be written as

[tex]P( A \cup B) = P(A) + P(B) - P(A)P(B)[/tex]

However, I've seen that using both formulas for the same problem gives different answers in some problems. Does anyone know why? Is there a condition for applying the second formula?