HELPP PLEAASE I DO GIVE BRAINLESS

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?