Martingales and Markets

Roulette is not a “fair” game, but it’s about as close as you can get in a casino. Assuming a standard wheel with 18 black slots, 18 red slots, and two green slots (0 and 00), your odds of hitting on black or red are 47.37% (18/38). The “house edge” is 5.26% as they will win 52.