(adsbygoogle = window.adsbygoogle || []).push({}); permutation question (math) [urgent]

image here

please solve this problem for me. the correct answer is c.

i put 10!/(4!6!), then i know i am suppose to divide/subtract something, but i dont know what. (i have never done this kind of problem before.)

**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!

# Homework Help: Permutation question (math) [ ]

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