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    Birthday Problem

    Input value

    number of people | 23

    Probabilities that people have the same birthday

    | probability | chance at least 2 the same | 0.5073 | ≈ 1 in 2 at least 3 the same | 0.01271 | ≈ 1 in 79 (assuming people chosen independently and all 365 possible birthdays are equally likely)

    Probability vs. number of people

    Probability vs. number of people

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