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Math Help - i want help in founding equation in my problem

  1. #16
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    Quote Originally Posted by Plato View Post
    That is a completely standard notation used in counting problems.
    It is the binomial coefficient.

    \dbinom{N}{k}=\dfrac{N!}{k!(N-k)!}.
    Please don't tell us that you do not know about factorials.
    sorry but i don't know about them
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  2. #17
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    at all thx
    but i think when using this way the result will be 378 not 336 for example of 16 , 6
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  3. #18
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    Quote Originally Posted by mido22 View Post
    sorry but i don't know about them
    This is not a tutorial service.


    Quote Originally Posted by mido22 View Post
    but i think when using this way the result will be 378 not 336 for example of 16 , 6
    \dbinom{11}{6}-\dbinom{9}{4}=336
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  4. #19
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    Quote Originally Posted by Plato View Post
    This is not a tutorial service.
    ok but i get a binomial calculator and i entered N : X - y +1 and K : y
    and subtract from it :
    N : x - y -1 and k : y and then the solution will be 378 not 336
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  5. #20
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    ah yes thx very much plato u r right
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