Exposing the "Razzle Dazzle" carnival scam

Razzle Dazzle is a carnival game in which you roll marbles into a tray with numbered holes. Once you get to 100 points, you can win fabulous prizes. It looks like a can't lose game, but in this video Brian Brushwood and mathematician James Grime reveal why it's a scam.
[via Doobybrain]