Statistical Applets: Probability 2 (the roulette wheel)
The American roulette wheel has 38 numbered slots: 1 through 36, 0, and 00. If the wheel is fair, the ball will be equally likely to end up in any slot.
In this applet, you can study the behavior of the wheel through a small number of spins, as well as a large number. You can also investigate the probability of certain sets of outcomes (events); does the empirical evidence from the wheel agree with the theoretical model that says:
P(A) = (Number of Outcomes in A) / (Number of Possible Outcomes)