The casino Sportsbooks make their money on sports bets by collecting a commission on losing bets. This is called the Vigorish or Vig for short. The most common odds are 11 to 10. This means that if you want to win $100 you are risking $110. For example, you place a bet on the Giants at the casino sports book and pay $110. If the Giants win you collect $210 when you cash your winning ticket. If you lose your bet you lose the $110.
Benter had been enraptured by Beat the Dealer, a 1962 book by math professor Edward Thorp that describes how to overcome the house’s advantage in blackjack. Thorp is credited with inventing the system known as card counting: Keep track of the number of high cards dealt, then bet big when it’s likely that high cards are about to fall. It takes concentration, and lots of hands, to turn a tiny advantage into a profit, but it works.