If P(X)=0.3P(X) = 0.3P(X)=0.3 and P(X∪Y)=0.5P(X \cup Y) = 0.5P(X∪Y)=0.5 for mutually exclusive events XXX and YYY, what is P(Y)P(Y)P(Y)?
0.2
0.5
0.8
0.15