作者catspace (柏拉图的永恒...)
看板GMAT
标题Re: [计量] 求救两题GWD
时间Thu Aug 14 01:11:34 2008
※ 引述《oranger (从新出发)》之铭言:
: GWD3-18
: 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 ?
: Ans: [100(k-m)]/(100+m)%
: GWD5-28
: Last Sunday a certain store sold copies of Newspaper A for 1.00 each and
: copies of Newspaper B for 1.25 each, and the store sold no other newspapers
: that day. If r percent of the store's revenues from newspaper sales was from
: Newapaper A and if p percent of the newspapers that the store sold were copies
: of Newspaper A, which of the following expresses r in terms of p ?
: Ans: 400p/(500-p)
: 请帮忙解答一下,谢谢!
先解决3-18
设原始价格为Po, 原始EPS为Eo
则所求为 Po(1+k) Po
-------- -- ---
Eo(1+m) Eo Po(k-m) Eo
---------------- X100% = ----------X ----X 100%
Po Eo(1+m) Po
----
Eo
(k-m) 100(k-m)
= -----X 100% = -------- #
(1+m) (1+m)%
--
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1F:→ oranger:谢谢 算式看懂了 可是答案的分母跟正解不一样耶 08/14 23:44