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What have you tried? Do you know the formula for a binomial coefficient? $\displaystyle ^nC_r = \frac{n!}{(n-r)!\ r!}$
From what formula is it? Can't see it clearly.
nCr=n!/((r!)(n-r!)) with this formula you can try it. Thank you Bizworldusa
Thank you for the formula bizworldusa _____________ walking bridges
This formula is the basic formula of probability.It is used if we select some items out of many items.It means we are selecting r items out of n items.
I think it would be like that : ^{n}C_{r} = n!/{(n-1)! r!} Quadratic Formula Calculator
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