CAPE Pure Mathematics Unit 2 · May/June 2015 · Paper 1 · Question Q34

X and Y are mutually exclusive events. If P(X) = \frac{1}{4} and P(Y) = \frac{1}{5}, then P(X \cup Y) =

1. (A)\frac{1}{9}
2. (B)\frac{2}{5}
3. (C)\frac{9}{20}
4. (D)\frac{1}{20}