The question of coin toss probabilities is rather different than the questions we asked in Chapter 9 — e.g., when do we expect a light bulb to burn out? There are only a finite number of different possible outcomes from tossing a coin five times. (It may not be obvious yet, but we will see that the number of possible outcomes is 32.) When we do not have a continuum of possible outcomes, our subject is discrete probability, as distinguished from continuous probability. However, we did venture briefly into discrete probability in Chapter 9 when we considered a discrete approximation to the light bulb problem.