Atheater has 17 rows of sears on the floor and 11 rows of seats in the balcony. there are 55 seats in each row. which is the best estimate of the total number of seats in the theater?

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?