GRE考试经历改革之后,新GRE数学比起就GRE难度有所增大,这对于数学基础不好的考生来讲是很不利的,下面为大家整理了比较容易出错的GRE数学难题供同学们作为参考,希望帮助考生提高自己的数学水平,从而获得GRE考试高分。
GRE考试中最易出错的GRE数学难题如下:
1. n个数从小到大排列,求/4,设商为i,余数为j ,则可求得1st Quartile为:/4+j/4
2. 4个,2个的排列方式 15
3 .5双袜子,同时去2只,刚好配对的概率。1/94. 40人说French,60人说Russian,80人说Italy,说两种语言的有50人,说三种语言的有 10人。 共有125人,问不说这些语言的有几人。 Key:125-=15
5 等腰直角三角形边长2加2倍根号2,求面积。
6. 某种溶液浓度为125gram perliter, 转换成 ounce per gallon,求表达式。已知 1 ounce=28.xxx gram and 1 gallon=3.875 liter
7. x,y,z 均方差为d, 求x+10,y+10,z+10的均方差
8. 1的概率是0.8,2的概率是0,6,问是1或是2或是both的概率,1-0.60.8=0.92.
9. 还有一组测量数据中,12.1比mean低1.5个标准差,17.5比mean高3.0个标准方差。问mean是多少.13.9
10. 图表题,1992年总和是50,96年是60,每年至少增长1,问最大的年增长:7.0
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