The time t that it takes johann to drive to work varies inversely as his speed. on a day when
johann averages 45 mph, it takes him 20 min to drive to work. how long will it take him to drive
to work when he averages only 40 mph?

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?