2013 YJC P2 Q7

I have a choice of two routes to get to school. The probability that I am punctual for school is \(\frac{43}{50}\) and the probability that I choose the first route is \(\frac{3}{5}\) . If I get to school punctually, the probability that the first route is chosen is \(\frac{27}{43}\). Find the probability that I get to school punctually if

1. I choose the first route,[2]
2. I choose the second route.[2]