Part 3 · Roulette

Anatomy of roulette

  • 37 slots: numbers 1-36 plus zero (0)
  • 18 red + 18 black
  • Zero is green: neither red nor black

A $100 bet on red:

Red → you win $100
Black or zero → you lose $100

Probability of winning = 18/37 ~ 48.6% - not 50%

The difference is only 1.4%, caused by a single zero.