Marieliza’s recipe for chocolate cake requires sugar, eggs, and flour. The ratio of cups of sugar to cups of eggs is 2:6. The ratio of cups of eggs to cups of flour is 8:6. A set of 10 cakes has a total of 11 cups of sugar. How many cups of eggs are in each pie? How many cups of flour?

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?