今天针对新版gre数学复习，小编给大家整理的是关于Combinations of Choices的相关内容，这些概念在考试中一定会考到的。希望考生能再接再厉，取得一个好成绩，突破新版gre数学难的困境。

Combinations

Number of ways we can select n objects from a group of m distinct objects is m!/(n!*(m-n)!).

Example:

Number of possible ways to pick 4 oscar nominations from a list of 50 movies is 50!/(4!*(50-4)!)=50!/(4!*46!)=50*49*48*47/24=230300.

Remember:

This does not apply if there are identical objects.