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  2. Odds - Wikipedia

    en.wikipedia.org/wiki/Odds

    In probability theory, odds provide a measure of the probability of a particular outcome. Odds are commonly used in gambling and statistics.For example for an event that is 40% probable, one could say that the odds are "2 in 5", "2 to 3 in favor", or "3 to 2 against".

  3. Fixed-odds betting - Wikipedia

    en.wikipedia.org/wiki/Fixed-odds_betting

    Fixed-odds betting is a form of gambling where individuals place bets on the outcome of an event, such as sports matches or horse races, at predetermined odds. In fixed-odds betting, the odds are fixed and determined at the time of placing the bet. These odds reflect the likelihood of a particular outcome occurring.

  4. Spread betting - Wikipedia

    en.wikipedia.org/wiki/Spread_betting

    the trading is off-exchange, with the contract existing directly between the market-making company and the client, rather than exchange-cleared, and is thus subject to a lower level of regulation. Financial spread betting is a way to speculate on financial markets in the same way as trading a number of derivatives .

  5. Prediction market - Wikipedia

    en.wikipedia.org/wiki/Prediction_market

    They are exchange-traded markets established for trading bets in the outcome of various events. [1] The market prices can indicate what the crowd thinks the probability of the event is. A typical prediction market contract is set up to trade between 0 and 100%.

  6. Betting strategy - Wikipedia

    en.wikipedia.org/wiki/Betting_strategy

    A betting strategy (also known as betting system) is a structured approach to gambling, in the attempt to produce a profit.To be successful, the system must change the house edge into a player advantage — which is impossible for pure games of probability with fixed odds, akin to a perpetual motion machine. [1]

  7. Martingale (betting system) - Wikipedia

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

    In this example, the probability of losing the entire bankroll and being unable to continue the martingale is equal to the probability of 6 consecutive losses: (10/19) 6 = 2.1256%. The probability of winning is equal to 1 minus the probability of losing 6 times: 1 − (10/19) 6 = 97.8744%. The expected amount won is (1 × 0.978744) = 0.978744.

  8. Sports betting - Wikipedia

    en.wikipedia.org/wiki/Sports_betting

    Odds boards in a Las Vegas sportsbook. 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".

  9. Gambling and information theory - Wikipedia

    en.wikipedia.org/wiki/Gambling_and_information...

    Surprisal and evidence in bits, as logarithmic measures of probability and odds respectively. The logarithmic probability measure self-information or surprisal, [4] whose average is information entropy/uncertainty and whose average difference is KL-divergence, has applications to odds-analysis all by itself. Its two primary strengths are that ...