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  1. Anonymous

    Probability Problem

    If I was to toss a coin one million times how many times would I expect the following to occur: -

    5 Straight heads or tails
    6 Straight heads or tails
    7 Straight heads or tails
    8 Straight heads or tails
    9 Straight heads or tails
    10 Straight heads or tails


    Roger Bramall
    ([email protected])

    • Join Date: Jun 2004
    • Posts: 1,369
    What about (offhand):
    0.5^x * (10E6 - x + 1)
    This covers 'ar least' x straight heads.
    If you want exactly x successes, multiply by: 0.5^(10E6 - x)


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