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In the fall of 2024, Citizen Math released updated versions of every lesson in our library, plus a few new ones! We know you may have already prepped an earlier version or planned a repeat of last year, so we're continuing to make these earlier versions available through Thursday December 5, 2024.

You can find the new lessons through the regular search, and we hope you love them as much as we do. You can read more about these updates in Our Community.

What’s the best way to play roulette? As glamorized in casino ads around the world, the prospect of winning big on a spin of roulette can set hearts racing. And yet somehow the house always wins in the end!

In this lesson, students use probabilities and odds to analyze roulette payouts and debate the optimal strategy for winning the game (including not playing at all).

- Roulette is a popular casino game of chance in which the player bets on a number (or range of numbers)
- In the long-run, people should expect to
*lose*money playing roulette, and casinos should expect to*gain*money. - Casinos are in the business of making money. Any game they offer is likely to be in their advantage over the long-run.
- Though not everyone does, you can use probabilities and expected value to inform life choices.

- Describe the probability of an event given a sample space
- Calculate expected value
- Reason with probabilities to inform real-world decisions