今天針對新版gre數(shù)學(xué)復(fù)習(xí)，小編給大家整理的是關(guān)于Combinations of Choices的相關(guān)內(nèi)容，這些概念在考試中一定會考到的。希望考生能再接再厲，取得一個好成績，突破新版gre數(shù)學(xué)難的困境。

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.