作者miomio0322 (冒烟的LEO)
站内GRE_Verbal
标题[计量] 陈向东最新数学预测试题
时间Thu Oct 9 09:51:58 2008
想请问第一回的题目
因为是新手，要是有没有注意到礼貌的地方请多包涵
8.A political poll showed that 80 percent of those polled said they
would vote for proposition P, 70 percent actually votedd for P,
and of those who did not say they would vote for P, 20 percent of those
polled voted for P.
What percent of those polled voted for P ?
(这题题义有点看不懂)
11.(图表题)第三个选项要如何判断
16.要怎麽判断才会比较快算出大小(省一点时间)
(1)1/2+1/3
(2)7/8+3/20
(3)15/16+2/40
(4)12/25+12/30
(5)35/102+2/3
17. S is the sum fo the first n negative integer powers of 2.
S=2^(-1)+2^(-2)+......2^(-N)
S 1
(我是根据等比级数公式S=A/(1-R)) 算出来觉得应该是C选项
可是答案是B，是不是我哪里算错了呢
谢谢各位大大
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