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新gre数学重要考点:Combinations of Choices.

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  2011新gre考试实施以来,不仅对写作部分茫然不知所措,就连我们所擅长的数学也甚是担忧,相信这其中的原因还是由于考生在新gre数学复习时没有把基础打牢。如果新版gre数学基本考点都没有复习到,如何能拿到分数呢?所以说,想要新版gre数学考好,复习的时候一定要把基本概念和重要考点都弄扎实。

  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.获得更多gre考试咨询点击进入>>>>澳际免费咨询顾问或联系QQ客服:

  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.

  由于美国数学基础教育的难度增加导致数学考试越来越难,但新gre数学复习考点都是高中时候学到的知识点,考生不要过于紧张,把基本概念弄明白,再记住一些新版gre数学必备的词汇,那么相信新版gre数学应该没有问题。

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