Here, we are to find the probability of event B given event A
What we will use here is the Bayes' theory of conditional probability
Mathematically, we can have this as;
[tex]\begin{gathered} P(B|A)\text{ = }\frac{P(A\text{ n B)}}{P(A)} \\ =\text{ }\frac{0.2}{0.6}\text{ = }\frac{1}{3} \end{gathered}[/tex]