Probability

In a school there are 3 sections $A, B$ and $C$. Section $A$ contains 20 girls and 30 boys, section $B$ contains 40 girls and 20 boys and section $C$ contains 10 girls and 30 boys. The probabilities of selecting the section $A, B$ and $C$ are $0.2,0.3$ and 0.5 respectively. If a student selected at random from the school is a girl, then the probability that she belongs to section $A$ is