I'll be happy to figure out how this law of the thirds equates in terms of probability. In the meantime, you might go here while waiting.

http://www.thewizardofodds.com/game/roulette.html

You might also go here to see how these 'no-fail' systems stack up.

http://xerxx.nu/oops/

But wherever you go and whatever you do, don't be fooled into thinking you can constantly and consistently win at roulette.

-Duck