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  2. Kelly criterion - Wikipedia

    en.wikipedia.org/wiki/Kelly_criterion

    E.g., if betting $10 on a 2-to-1 odds bet (upon win you are returned $30, winning you $20), then = $ / $ =. The figure plots the amount gained with a win on the x-axis against the fraction of portfolio to bet on the y-axis. This figure assumes p=0.5 (that the probability of both a win and a loss is 50%).

  3. Odds - Wikipedia

    en.wikipedia.org/wiki/Odds

    Odds of 4/1 would imply that the bettor stands to make a £400 profit on a £100 stake. If the odds are 1/4, the bettor will make £25 on a £100 stake. In either case, having won, the bettor always receives the original stake back; so if the odds are 4/1 the bettor receives a total of £500 (£400 plus the original £100).

  4. Mathematics of bookmaking - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_bookmaking

    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 ...

  5. Odds ratio - Wikipedia

    en.wikipedia.org/wiki/Odds_ratio

    The sample odds ratio n 11 n 00 / n 10 n 01 is easy to calculate, and for moderate and large samples performs well as an estimator of the population odds ratio. When one or more of the cells in the contingency table can have a small value, the sample odds ratio can be biased and exhibit high variance .

  6. Gambling mathematics - Wikipedia

    en.wikipedia.org/wiki/Gambling_mathematics

    The events player 1 is dealt two connectors of hearts higher than J and player 2 is dealt two connectors of hearts higher than J are exclusive (only one can occur); The events player 1 is dealt (7, K) and player 2 is dealt (4, Q) are non-independent (the occurrence of the second depends on the happening of the first, while the same deck is in use).

  7. Winning percentage - Wikipedia

    en.wikipedia.org/wiki/Winning_percentage

    For example, if a team's season record is 30 wins and 20 losses, the winning percentage would be 60% or 0.600: % = % If a team's season record is 30–15–5 (i.e. it has won thirty games, lost fifteen and tied five times), and if the five tie games are counted as 2 12 wins, then the team has an adjusted record of 32 12 wins, resulting in a 65% or .650 winning percentage for the ...

  8. Pythagorean expectation - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_expectation

    If each team wins in proportion to its quality, A's probability of winning would be 1.25 / (1.25 + 0.8), which equals 50 2 / (50 2 + 40 2), the Pythagorean formula. The same relationship is true for any number of runs scored and allowed, as can be seen by writing the "quality" probability as [50/40] / [ 50/40 + 40/50], and clearing fractions .

  9. Mega Millions - Wikipedia

    en.wikipedia.org/wiki/Mega_Millions

    Match 1+MB: $3; Match 0+MB: $2; Payouts in California remained parimutuel. The odds of winning or sharing a Mega Millions jackpot (October 19, 2013 – October 27, 2017): one in about 258.9 million. The overall odds of winning a prize were one in 14.71, including the base $1 prize for a "Mega Ball"-only match.