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  2. Mathematics of bookmaking - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_bookmaking

    In gambling parlance, making a book is the practice of laying bets on the various possible outcomes of a single event. The phrase originates from the practice of recording such wagers in a hard-bound ledger (the 'book') and gives the English language the term bookmaker for the person laying the bets and thus 'making the book'.

  3. Spread betting - Wikipedia

    en.wikipedia.org/wiki/Spread_betting

    Spread betting is any of various types of wagering on the outcome of an event where the pay-off is based on the accuracy of the wager, rather than a simple "win or lose" outcome, such as fixed-odds (or money-line) betting or parimutuel betting. A point spread is a

  4. Martingale (betting system) - Wikipedia

    en.wikipedia.org/wiki/Martingale_(betting_system)

    Increasing the size of wager for each round per the martingale system only serves to increase the average loss. Suppose a gambler has a 63-unit gambling bankroll. The gambler might bet 1 unit on the first spin. On each loss, the bet is doubled. Thus, taking k as the number of preceding consecutive losses, the player will always bet 2 k units.

  5. Parlay - Wikipedia

    en.wikipedia.org/wiki/Parlay

    A parlay, accumulator (or acca), combo bet, or multi is a single bet that links together two or more individual wagers, usually seen in sports betting. Winning the parlay is dependent on all of those wagers winning together. If any of the bets in the parlay lose, the entire parlay loses.

  6. Office Wagers Are Almost a Sure Bet - AOL

    www.aol.com/news/2011-03-15-office-wagers-are...

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  7. Due column betting - Wikipedia

    en.wikipedia.org/wiki/Due_Column_betting

    Due-column wagering is considered a fixed-profit system because the due-column bettor determines the desired profit before betting begins. However, whereas with percentage-based money-management systems the bettor varies their bets as a percentage of their bankroll, with a series of due-column bets they bet the amount necessary to make their desired profit plus the total amount necessary to ...

  8. Sports betting - Wikipedia

    en.wikipedia.org/wiki/Sports_betting

    Sports betting is the activity of predicting sports results and placing a wager on the outcome. Sports bettors place their wagers either legally, through a bookmaker/sportsbook, or illegally through privately run enterprises referred to as "bookies". The term "book" is a reference to the books used by wage brokers to track wagers, payouts, and ...

  9. Sports betting systems - Wikipedia

    en.wikipedia.org/wiki/Sports_betting_systems

    The network of bettors would then bet on games in which they had a statistical advantage (as determined by the software). Billy Walters, who was profiled on 60 Minutes, [1] was the most famous member of the group. [2] Sports betting systems have not always been well trusted or liked by bettors.