ChaseDream

标题: TTGWD3-18 [打印本页]

作者: candypolo 时间: 2006-8-9 00:48
标题: TTGWD3-18

Q18:

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) %

看了好几遍，就是没看明白最后让比什么，请指点，谢谢

作者: ruah 时间: 2006-8-9 01:48

Suppose the price is x per share and the earning is y per share. The question asks the change of the ratio x/y.

On the price side, the increased price is (1+k%)x

On the earning side, the increased earning is (1+m%)y

Hence, the new ratio is ((1+k%)x)/((1+m%)y).

The percentage of change of the ratio is

100%*(((1+k%)x)/((1+m%)y)-x/y)/(x/y)

Choose D.

作者: candypolo 时间: 2006-8-9 02:47
终于明白了，是问新的价格利润增长比在原价格利润比上增长的比率。阅读还是不行呀！谢谢啦！还想问一下，数学要想51必须全对吗？50允许错几个?现在很是担心我的数学呀！

作者: 期待蔚蓝 时间: 2006-11-7 08:41

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