Data & ProbabilityProbability

Why Casinos Always Win

Over enough bets, a small edge becomes a certainty

A roulette wheel is honest, every spin is pure luck, and players win big every night. So why is the casino never worried?

You'll find out

  • What one green pocket is really worth
  • Why ten spins prove nothing
  • When luck stops mattering

Why it matters

The same math prices insurance, runs lotteries and tests new drugs. It starts with one small tilt in a spinning wheel.

About 3 min6 interactive slides · 5 questionsLesson 115 · Zone 13

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