Is 2 square root of 5 plus three rational or irrational

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Answer pls man im trying to get out of summer school

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?