A taxicab charges riders a flat fee of 3.75 and an additional 0.85 per mile of their trips. id Diego was charged 10.55 for his taxicab ride, how far was his trip?

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?