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  2. Coin flipping - Wikipedia

    en.wikipedia.org/wiki/Coin_flipping

    Coin flipping, coin tossing, or heads or tails is the practice of throwing a coin in the air and checking which side is showing when it lands, in order to randomly choose between two alternatives. It is a form of sortition which inherently has two possible outcomes.

  3. Penney's game - Wikipedia

    en.wikipedia.org/wiki/Penney's_game

    Recently Robert W. Vallin, and later Vallin and Aaron M. Montgomery, presented results with Penney's Game as it applies to (American) roulette with Players choosing Red/Black rather than Heads/Tails. In this situation the probability of the ball landing on red or black is 9/19 and the remaining 1/19 is the chance the ball lands on green for the ...

  4. Checking whether a coin is fair - Wikipedia

    en.wikipedia.org/wiki/Checking_whether_a_coin_is...

    (Note: r is the probability of obtaining heads when tossing the same coin once.) Plot of the probability density f(r | H = 7, T = 3) = 1320 r 7 (1 − r) 3 with r ranging from 0 to 1. The probability for an unbiased coin (defined for this purpose as one whose probability of coming down heads is somewhere between 45% and 55%)

  5. Heads and Tails (card game) - Wikipedia

    en.wikipedia.org/wiki/Heads_and_Tails_(card_game)

    First, a row of eight cards are dealt; this is the "Heads" row. Then 8 piles of 11 cards are dealt; this is reserve. Below them is another row of eight cards, the "Tails" row. The object of the game is to free one Ace and one King of each suit and build each of them by suit; the Aces are built up to Kings while the Kings are built down to Aces.

  6. Matching pennies - Wikipedia

    en.wikipedia.org/wiki/Matching_pennies

    If one penny is heads and the other tails, Odd wins and keeps both coins. Matching pennies is a non-cooperative game studied in game theory. It is played between two players, Even and Odd. Each player has a penny and must secretly turn the penny to heads or tails. The players then reveal their choices simultaneously.

  7. Coin rotation paradox - Wikipedia

    en.wikipedia.org/wiki/Coin_rotation_paradox

    The outer coin makes two rotations rolling once around the inner coin. The path of a single point on the edge of the moving coin is a cardioid.. The coin rotation paradox is the counter-intuitive math problem that, when one coin is rolled around the rim of another coin of equal size, the moving coin completes not one but two full rotations after going all the way around the stationary coin ...

  8. Fair coin - Wikipedia

    en.wikipedia.org/wiki/Fair_coin

    Using for heads and for tails, the sample space of a coin is defined as: Ω = { H , T } {\displaystyle \Omega =\{H,T\}} The event space for a coin includes all sets of outcomes from the sample space which can be assigned a probability, which is the full power set 2 Ω {\displaystyle 2^{\Omega }} .

  9. Heads and Tails - Wikipedia

    en.wikipedia.org/wiki/Heads_and_Tails

    Heads and Tails may refer to: Obverse and reverse, sides of a coin; Coin flipping; Heads and Tails (card game), a solitaire card game which uses two decks of playing cards. Heads and Tails (crowd game), touching ones head or tail; Heads and Tails, a 1995 Russian Film; Heads and Tails (Russian telecast), a Ukrainian Russian-speaking travel series