本文为大家介绍的GRE数学复习考点是“总数”。
新版GRE数学复习重要考点：Total Members
Sometimes there are members that do not belong to either set A or B.In that case the total number of members=Size A+Size B-Number of common members+Number of members not in A or B.
Example:
In an office, 35 people drink coffee, 27 drink tea, 12 drink both, and 4 drink neither. The total number of people in the office = 35+27-12+4=54.
In a class of 40 students, 20 study algebra, 15 study geometry, 8 study both.The total number of students that do not study either=40-(20+15-8)=13.
Remember:
This is a relation between five numbers, and any one can be calculated given the other four.
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。
>>点击查看GRE数学重要考点专题，阅读更多相关文章！
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