Even Money Bets
However, with roulette, there are no true "even-money" bets. There are several bets that pay even-money, but the true odds are not 50- 50 as in the coin toss. Let's take a look at "even-money" bets on both zero and double zero wheels.
On a double-zero wheel, an "even-money" bet wins 18 times but loses 20 times. On a single-zero wheel, this wager wins 18 times but loses 19 times. Thus your odds of winning on a double-zero wheel are not 1 to 2 as with a coin toss, but 1 to 2.11. Since the house pays off a dollar for a win rather than $1.11, it keeps 11 cents for itself as the house edge or casino "vig." This gives the casino a 5.26% edge over "even-money" bets in the long-run.
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