How does the estimate compare to the actual amount? Explain. Step 1: Round $94 to 90.

Step 2: Round 12% to 10%.

Step 3: 12% of $94 is about 9.

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?