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  1. G

    Coin probability problem

    We throw the coin 1 000 000 times. How many times on average will make 13 successful heads? Now the problem with the naive: 1 000 000/(2^13) is that once it made 13 heads the 14 head will happen with 1/2 probability , but it will count as 2 13 successful heads. 15 will happen 4xtimes less, but...
  2. G

    Generalization of urn problem

    While simple urn problems - given x green and y black balls, whats the probability if we take 6 that 2 will be black etc. are easily solvable with hypergeometric and binomial distribution. Is there a distribution that solves it a general case for example: Given 1000 blue, 1200 green, 2000 red...