$A$ and $B$ are independent with $P(A) = 0.3$ and $P(B) = 0.4$. What is $P(A \cup B)$?

Explanation

1. 01

   Independent: $P(A \cap B) = 0.3 \times 0.4 = 0.12$.

2. 02

   $P(A \cup B) = 0.3 + 0.4 - 0.12 = 0.58$.