What is the likelihood of winning at roulette?

The possibility of winning big on a single spin of roulette sets hearts racing all over the world. Everyone knows that the house always wins in the end, or at least that casinos make tons of money somehow. But where does the house edge come from?

In this lesson, students examine the betting and gameplay of roulette to learn about **probabilities** and **odds**. They investigate a “fair” game, where each side can expect to break even in the long run… and then understand how casinos get their mathematical advantage.

- Calculate probabilities, odds, and payouts for a “fair” roulette wheel, and understand how they are related
- Examine a real roulette wheel, and learn how a casino alters a game to its advantage
- Discuss whether or not it’s possible to win money or break even playing roulette in the long run

Nevada Gambling Commission