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  2. Mathematics of bookmaking - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_bookmaking

    Fractional odds are written a − b (a/b or a to b), meaning a winning bettor will receive their money back plus a units for every b units they bet. Decimal odds are a single value, greater than 1, representing the amount to be paid out for each unit bet. For example, a bet of £40 at 6 − 4 (fractional odds) will pay out £40 + £60 = £100.

  3. Sports betting - Wikipedia

    en.wikipedia.org/wiki/Sports_betting

    Decimal odds of 2.00 are an even bet. UK format (fractional odds) are used by British bookmakers. They are the ratio of the amount won to the stake – the solidus "/" is pronounced "to"; for example, 7/1 is "seven to one". Fractional odds of 1/1 are an even bet. US format odds are the amount won on a 100 stake when positive, and the stake ...

  4. Odds - Wikipedia

    en.wikipedia.org/wiki/Odds

    Decimal odds are favoured by betting exchanges because they are the easiest to work with for trading, as they reflect the inverse of the probability of an outcome. [13] For example, a quoted odds of 5.00 equals to a probability of 1 / 5.00, that is 0.20 or 20%. Decimal odds are also known as European odds, digital odds or continental odds. [9]

  5. 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 range of outcomes and the bet is whether the outcome will be above or below the ...

  6. Over–under - Wikipedia

    en.wikipedia.org/wiki/Over–under

    The goal of the betting company is to get the same amount of bets on both sides of the overtime game. [6] [7] [8] In theory, this means that the manager can set a zero value and adjust it later based on the number of incoming bets and/or factors that may affect the outcome of the game. In practice, the initial value is based on both ...

  7. Each-way - Wikipedia

    en.wikipedia.org/wiki/Each-way

    The odds paid on the place part of the bet are usually a fraction (commonly 1 ⁄ 2, 1 ⁄ 3, 1 ⁄ 4 or 1 ⁄ 5) of the win odds. The trade-off being that one has a greater chance of making one's bet in trade for getting less payoff for doing so. Examples are domestic football knockout competitions (e.g. FA Cup) where the quoted place terms ...

  8. Gambling - Wikipedia

    en.wikipedia.org/wiki/Gambling

    Fixed-odds betting and Parimutuel betting frequently occur at many types of sporting events, and political elections. In addition many bookmakers offer fixed odds on a number of non-sports related outcomes, for example the direction and extent of movement of various financial indices , the winner of television competitions such as Big Brother ...

  9. Upset (competition) - Wikipedia

    en.wikipedia.org/wiki/Upset_(competition)

    Leicester City F.C., an Association football Club, won the Premier League in the 2015-16 season despite being 5000-1 underdogs, an example of an upset [1] An upset occurs in a competition, frequently in electoral politics or sports, when the party popularly expected to win (the "favorite") is defeated by (or, in the case of sports, ties with) an underdog whom the majority expects to lose ...