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 Challenge
 Experimental Probability:  The ratio of the number of times an outcome occurs to the total amount of trials performed.

Hitting the Bull's-eye: How many times would you expect to throw the dart until you hit the bulls-eye?

Rolling Dice: Compare experimental and theoretical probabilities as you increase the number of times that dice are rolled.

Mystery Envelopes: Knowing what's in one envelope, should you keep your envelope or switch and ask for the other one?