Permutation

Colorized Definition

\newcommand{\order}{\color{c1}}
\newcommand{\total}{\color{c2}}
\newcommand{\stopCount}{\color{c3}}
\newcommand{\partOne}{\color{c4}}
\newcommand{\combo}{\color{c5}}

\displaystyle{\order P(\total n,\partOne k \order ) \plain = \stopCount \frac{\total n!}{\stopCount (n - \partOne k \stopCount ) ! }}

\order     To order (permute)
\partOne   k
\order     items from
\total     n
\order     choices,
\
\total      start counting all orderings
\plain       and
\
\stopCount   stop counting after
\partOne    k
\stopCount   items are found
## Read More - [Easy Combinations and Permutations](https://betterexplained.com/articles/easy-permutations-and-combinations/)

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