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Q1.On Saturday morning,Malachi will begin a camping vacation and he will return home at the end of the first day on which it rains.If on the first three days of the vacation the probability of rain on each day is 0.2,what is the probability that Malachi will return home at the end of the day on the following Monday?
A 0.008
B 0.128
C 0.488
D 0.512
E 0.640
答案 B 我看了答案都还算不出来 实在不会做
Q2.Last year the price per share of Stock X increased by k percent and the earnings per share of Stock X increased by m percent,where k is greater than m.By what percent did the ratio of price per share to earnings per share increase,in terms of k and m?
A.k/m%
B.(k-m)%
C.[100(k-m)]/(100+k)%
D.[100(k-m)]/(100+m)%
E.[100(k-m)/(100+k+m)%
答案D
题到底问的是谁比谁呀？是增加后的每SHARE价格比增加后的每SHARE的EARNING？死都没读懂
Q3.DS What is the value of 3的负（X+Y）次方/3的负（X-Y）次方
1.X=2
2.Y=3
答案是B 我选的C
Q4.DS a survey of 200 college graduates,30 percent said they had received student loans during their college careers,and 40 percent said they had received scholarships.What percent of those surveyed said that they received neither student loans nor scholarships during their college careers?
1.25% of those surveyed said that they received scholarships but no loans
2.50% of those surveyed said that they had received loans also said that they had received scholarships
答案是D 我选的A 第二个条件好奇怪哦 得到贷款的30% 得到奖学金的40% 怎么可能会有50%的人两个都得到呢？？？我知道条件二是可以算出来的 但是这个数据大家觉得有问题吗？我就是因为这个数据才选的A
Of the families in City X in 1994, 40 percent owned a personal computer.The number of families in City X owning a computer in 1998 was 30 percent greater than it was in 1994, and the total number of families in City X was 4 percent greater in 1998 than it was in 1994.What percent of the families in City X owned a personal computer in 1998?
A.50%
B.52%
C.56%
D.70%
E.74%
答案是A 求方法
谢谢大家~~ |
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发表于 2010-12-15 16:47:23
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