本文为大家介绍的GRE数学复习考点是“组合”。

新版GRE数学复习重要考点：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.

以上的内容大家一定要好好掌握，在考试的时候发挥出自己应有的水平。