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Math Help - number of turns required for a pattern

  1. #1
    Member
    Joined
    Nov 2010
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    number of turns required for a pattern

    Hi, given a pattern of result of tossing a coin ,how can one determine the number of tosses one needs to make to get that pattern?
    E.g :
    to get pattern
    HTHT we need to make 20 tosses.
    Is Pascal's triangle of any help here?
    The total possible outcomes of tossing a coin n times is 2^n ,so how can this
    help here?
    Thanks.
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  2. #2
    Member HappyJoe's Avatar
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    I don't understand your question. Perhaps you can elaborate on the following:

    What do you mean that we need to make 20 tosses to obtain the pattern HTHT? That pattern may occur after only 4 tosses, or it may not occur at all in 100 tosses.
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