Applying the Addition Rule for Probability Practice Test

A factory checks products for two features. Event $A$ is that a randomly chosen product is waterproof, and event $B$ is that it is scratch-resistant. Given $P(A)=0.52$, $P(B)=0.41$, and $P(A\cap B)=0.18$, what is the probability that $A$ or $B$ occurs (inclusive or: waterproof, scratch-resistant, or both)?

A product quality check defines event $A$ as “an item has a scratch” and event $B$ as “an item has a dent.” The inspection data show $P(A)=0.22$, $P(B)=0.15$, and $P(A\cap B)=0.06$. What is the probability that an item has a scratch or a dent (inclusive or)?