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A choose b

Revision as of 16:50, 15 June 2019 by Colball (talk | contribs) (Created page with "Here is the formula for a choose b: <math>\binom{a}{b}=\frac{n!}{k!(n-k)!}</math>. == Why is it important? ==")
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Here is the formula for a choose b: $\binom{a}{b}=\frac{n!}{k!(n-k)!}$.

Why is it important?

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