Knowing Roulette Probabilities By Richard Legg At Isnare.com Ezine Articles

The first thing you need to know about roulette probability is that the ball has no memory, and neither does the wheel. Each and every spin of the wheel must be considered a new spin, and all the previous rounds have absolutely no bearing whatsoever on the new spin. Even after 12 successive spins resulting in red, the next spin still has a 50-50 chance of hitting either color. Eventually, both red and black will even out over an extended period of time.

For example, you would have an equal chance of getting 50,000 reds and 50,000 blacks from 100,000 spins of the wheel. These numbers won't come up in turns, so you can expect streaks of four, five, or even ten of either color to appear. Consider the “eight reds in a row” sequence as our example for this analysis. If all the occurrences of eight reds in a row followed by a black number are to be counted, we would also discover the same number of occurrences showing eight black numbers in a row followed by another black, resulting in nine blacks in succession. If we go even further, we will also find an equal number of occurrences showing eight reds in a row, the same way as the blacks. Try this out if you have a roulette simulator.

What does this tell us? It shows us that out of the sets of eight reds in a row, you will see a 50% chance of eight reds followed by a black number, and 50% of eight reds followed by another red. The same is true of the black sets. So if you bet on black after eight reds in a row, or if you bet on red after eight blacks in a row, you till have a 50% chance of hitting the right number. No matter how long a streak of numbers goes on, your chances of getting it right would still be 50-50 for every new spin.

For the exact probabilities of roulette bets, here are the figures:

Double Zero Wheel (Bet, success rate, unsuccessful rate)
Single Number – 2.63% - 97.37%
Two Numbers – 5.26% - 94.74%
Three Numbers/A row - 7.89% - 92.11%
Four Numbers – 10.53% - 89.47%
Six Numbers/2 rows – 15.79% - 84.21%
Nine Numbers/3 rows – 23.68% - 76.32%
Twelve Numbers/4 rows/1 column/A third – 31.58% - 68.42%
Eighteen Numbers/Black or Red/Even or Odd/High or Low – 47.37% - 52.63%

Single Zero Wheel (Bet, success rate, unsuccessful rate)
Single Number – 2.70% - 94.59%
Two Numbers – 5.41% - 94.74%
Three Numbers/A row - 8.11% - 91.89%
Four Numbers – 10.81% - 89.19%
Six Numbers/2 rows – 16.22% - 83.78%
Nine Numbers/3 rows – 24.32% - 75.68%
Twelve Numbers/4 rows/1 column/A third – 32.43% - 67.57%
Eighteen Numbers/Black or Red/Even or Odd/High or Low – 48.65% - 51.35%

Remember, if you're going to gamble, you might as well be a smart gambler. It's always a good idea to keep track of your winning and losing runs. If you're on a winning streak, be smart and quit while you're ahead. If you're losing, don't fight it and don't try to chase your winnings. A good approach to playing roulette is the next best thing to a good roulette playing system.

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