Roulette: A Nevada roulette wheel has 38 pockets. Eighteen of them are red, eighteen are black, and two are green. Each time the wheel is spun, a ball lands in one of the pockets, and each pocket is equally likely.

(a) What is the probability that the ball lands in a red pocket
(b) If you bet on red on every spin of the wheel, you will lose more than half the time in the long run. Explin why this is so.