新 GRE 数学重要考点：Total MembersTotal 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. 由于美国数学根底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学问点，考生不要过于紧急，把根本概念弄明白，再记住一些新版 GRE 数学必备的词汇，那么信任新版 GRE 数学应当没有问题。
