俗話說：“工欲善其事必先利其器”。很多參加了新版gre考試的同學都覺得數(shù)學有點難度，相信這其中的原因還是由于考生在新版gre數(shù)學復習時沒有把基礎打牢。如果新版gre數(shù)學基本考點都沒有復習到，如何能拿到分數(shù)呢?所以說，想要新版gre數(shù)學考好，復習的時候一定要把基本概念和重要考點都弄扎實。
今天針對新版gre數(shù)學復習，小編給大家整理的是關于Combinations of Choices的相關內(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)學難的困境。
新版gre數(shù)學復習重要考點：Combinations of Choices
If there are n choices for one type and m choices for second type, then number of combinations for both types is the product of choices:n*m.
Example:
If there are 3 kinds of breads to choose from and 4 kinds of meats, then we can make 3*4=12 different sandwiches.
If an alphabet has 26 letters, then the number of possible 2 letter word is 26*26=676.All of them may not be vaild words.
Remember:
Do not add the choices to get the total combinations.
The product rule can be applied to more than two types of choices: if there are 3 kinds of breads, 4 kinds of meats, and 6 kinds of cheeses, then we can make 3*4*6=72 different sandwiches.
很多新版gre數(shù)學復習考點都是高中時候?qū)W到的知識點，考生不要過于緊張，把基本概念弄明白，再記住一些新版gre數(shù)學必備的詞匯，那么相信新版gre數(shù)學應該沒有問題。
今天針對新版gre數(shù)學復習，小編給大家整理的是關于Combinations of Choices的相關內(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)學難的困境。
新版gre數(shù)學復習重要考點：Combinations of Choices
If there are n choices for one type and m choices for second type, then number of combinations for both types is the product of choices:n*m.
Example:
If there are 3 kinds of breads to choose from and 4 kinds of meats, then we can make 3*4=12 different sandwiches.
If an alphabet has 26 letters, then the number of possible 2 letter word is 26*26=676.All of them may not be vaild words.
Remember:
Do not add the choices to get the total combinations.
The product rule can be applied to more than two types of choices: if there are 3 kinds of breads, 4 kinds of meats, and 6 kinds of cheeses, then we can make 3*4*6=72 different sandwiches.
很多新版gre數(shù)學復習考點都是高中時候?qū)W到的知識點，考生不要過于緊張，把基本概念弄明白，再記住一些新版gre數(shù)學必備的詞匯，那么相信新版gre數(shù)學應該沒有問題。