static/files/articles/combinations-and-permutations/formulas.tex


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\begin{array}{|l|c|c|c|}
\hline
    \text{Name} &
    \text{Ordered} &
    \text{With Repetition} &
    \text{Without Repetition} \\
\hline
    \text{Permutation} &
    \text{Yes} &
    n^k & 
    \frac{n!}{(n - k)!} \\
\hline
    \text{Combination} &
    \text{No} &
    {n + k - 1 \choose k} &
    {n \choose k} \\
\hline
\end{array}