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Please in desperate Evaluate C(20, 18).
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Please in desperate

Evaluate C(20, 18).

User Kamil Dziedzic
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\bf _nC_r=\cfrac{n!}{r!(n-r)!}\qquad \begin{cases} n=20\\ r=18 \end{cases}\implies _(20)C_(18)=\cfrac{20!}{18!(20-18)!}
User Nabin Paudyal
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