A. 0.11
P(A U C) =
P(A) + P(C) =
0.1 + 0.01
0.11
I’m not sure about B, but I think it is the same answer. A union of two probabilities is the probabilities that they happen added together. If they are mutually exclusive, they cannot happen at the same time, so we add their full probabilities together. Hope that helps