The area of a square is 144 square feet. what is the length of one side of the square? a. 72 feet b. 12 feet c. 36 feet d. 288 feet

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?