2. In casinos from Monte Carlo to Las Vegas, one of the most common gambling devices is the slot machine-the "one-armed bandit. A typical slot machine has three wheels that spin around behind s narrow window. Each wheel is marked with the following symbols: CHERRY, LEMON, ORANGE, BELL, and BAR. The window, however, allows you to see only one symbol on each wheel at a time. F example, the window might show the following configuration: PLUM, or BELL ORANGE BAR If you put a silver dollar into a slot machine and pull the handle on its side, the wheels spin around and eventually come to rest in some new configuration. If the configuration matches one of a set of winning patterns printed on the front of the slot machine, you get some money. If not, you're out a dollar. The following table shows a typical set of winning patterns, along with their associated payoffs: Patterns Payout BAR BAR BAR 250 BELL BELLBELL/BAR 20 PLUM PLUM PLUM/BAR 14 ORANGE ORANGE ORANGE/BAR 10 7 CHERRY CHERRYCHERRY CHERRY CHERRY CHERRY 2 The notation BELL/BAR means that either a BELL or a BAR can appear in that position, and the dash means that any symbol at all can appear. Thus, getting a CHERRY in the first position is automatically good for two dollars, no matter what appears on the other wheels. The LEMON symbol never pays off, even if you happen to line up three of them