A jar contains four blue marbles and two red marbles. Suppose you choose a
marble at random, and do not replace it. Then you choose a second marble.
Find the probability of each event.
37. You select a blue marble and then a red marble.
38. You select a red marble and then a blue marble.
39. One of the marbles you select is blue and the other is red.
40. Both of the marbles you select are red.