在备考GMAT数学过程,经常会遇到一些GMAT数学难题。由于解题思路以及方法使用不当,往往会导致所谓的难题耽误大量时间,从而影响GMAT数学复习效果。针对这个问题,小编特分享如何解GMAT数学难题,希望可以帮到各位。文中观点仅供参考。
学生总数240,学SCIENCE的是140,学MATH的170,求LEARN MATH BUT NOT SCIENCE的人数?
1)THERE ARE 55 STUDENTS WHO LEARN SCIENCE BUT NOT MATH
2)30 DIDNT SELECT ANY SUBJECT
这种题有两种解题方法,
1、画图法
画两个相交的圆A、B。圆A下写学甲科的总数,圆B下写学乙科的总数;两圆相交的部分写两科都学的数量,不相交的部分写各自只学一门的数量。再在外面画一个大方框,是学生总数,圆外方框内是什么都不学的。这样就一目了然了。
2、概念法
P=P P-P
以本题为例,至少学一科的=只学甲科 只学乙科-两科都学
全集=A+B-A交B+非A非B
normal distribution下One standard deviation away from the mean的possibility为68%,Two standard deviation away from the mean的possibility为95%,standard deviation = 10。一种cougar的体长呈正态分布,均值60英寸,问体长在70到80英寸之间的概率?
落在平均值标准方差内的概率
possibility = X
60-10
60-102
只落在一边的概率就要除以二,基本上这种题画一条数轴,做几个点会更一目了然一些。
/2 = 13.5
以上就是小编为大家整理的如何解GMAT数学难题,文中采用了两种方法,一个是作图法,一个是概念法。个人还是感觉作图法比较形象,当然这完全根据个人习惯,考生可自行选择最后祝大家都能考出好成绩。
上一篇: GMAT数学高分技巧分享
下一篇: GMAT数学的常用公式整理
Tickets for 9 yuan offered on new Hebei air route
Xi offers support to overseas Chinese
Premier seeks talks over dispute
Obama informed of Merkel surveillance
Tragedy leads to calls for school safety
Terror at sea as Thai tourist ferry sinks
Giant duck to exit after drawing crowds
London mayor hails free trade, subway system during visit
Democrats win NYC and Virginia
Beijing-Tokyo ties 'unlikely to recover soon'
New road links remote Tibet county to rest of the country
Lang Lang takes on UN Messenger of Peace role
Questions linger over gouged eyes incident
Breast cancer on the rise in China
TEPCO suffers string of mishaps
World's first curved smartphone hits South Korean stores
Europe monitors phones, Internet
US trio wins Nobel chemistry prize
Chinese arts travel the world
US debt ceiling crisis continues
17 accused of making and selling fake drugs
Lenovo's new secret weapon: Hollywood star
Former mistresses are active online whistle-blowers
30,000 turn out in Beijing Marathon
Museums look to innovation for future
Film project to spotlight ethnic groups
Newspaper offers apology after detained journalist's confession
Market for English courses surges
Shuttle bus makes time fly for Beijing commuters
Xi calls for targeted policies to fight poverty