If $P(A) = P(B) = K$ for two mutually exclusive events $A$ and $B$, find $P(A \cup B)$.
If P(A)=0.3P(A) = 0.3P(A)=0.3 and P(A∩B)=0.03P(A \cap B) = 0.03P(A∩B)=0.03, find P(B/A)P(B/A)P(B/A).
