1) According to "Encyclopedia Britannica," between 12 and 25 percent (depending on the locale) of the money that is bet at the tracks goes to the state and to the racing association to cover expenses and profits.
2) "Money" magazine in January 1974, William Bruns, a free-lance writer from Los Angeles, discussed the "house edge" or percentage against the gambler that is built into each game. The house edge in the game of craps varies from 1.4 to 9 percent, depending on the choices the gambler makes as he plays the game.
3) In the game of roulette, the house edge is inflexibly set at 5.26 percent against the gamblers on every spin of the wheel.
4) In baccarat, the house edge is a rather thin 1.25 percent, or $1.25 out of each $100 bet.
5) The slot machine is "the most efficient way to get poor quickly in Las Vegas." They are unregulated by the state and can be set by the owner to pay off as frequently or infrequently as he or she likes. They will clean you out in the long run.
6) "Dunn's Review" for December 1974, contained a table showing the "Winner's Share" for 13 states that conduct lotteries. They vary from a high of 51 percent for Delaware to a low of 40 percent for New York; most were in the area of 45 percent.