How do you write the permutation and combination formulas using latex. This is the best I can do:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]n_P_r=\frac{n!}{(n-r)!}[/tex]

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Latex Formula

**Physics Forums | Science Articles, Homework Help, Discussion**