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GWD30-14

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31#
发表于 2008-11-21 18:35:00 | 只看该作者

You got it !

另外個角度看,加權平均的概念,或許也好懂

我當初把文意看走偏了: I misinterpreted Fact2: Overall rate... =  Do / (Do+For) 與 For/(Do+For)比

正確的Fact 2: Total Do (Accepted)/ Total Do submitted  與Total For(Accepted)/ Total For submitted  比

感謝樓上的同學

From Taiwan


[此贴子已经被作者于2008-11-21 18:46:05编辑过]
32#
发表于 2009-3-5 11:56:00 | 只看该作者

20樓 最牛 upup

33#
发表于 2009-4-9 08:47:00 | 只看该作者
up
34#
发表于 2009-6-10 15:57:00 | 只看该作者
很奇怪的一道题                                           
35#
发表于 2009-7-22 03:12:00 | 只看该作者
OK
36#
发表于 2009-7-28 10:43:00 | 只看该作者
37#
发表于 2009-8-2 19:05:00 | 只看该作者
~~
38#
发表于 2009-12-20 03:52:10 | 只看该作者

Background information:  This year, each film submitted to the Barbizon Film Festival was submitted in one of ten categories.  For each category, there was a panel that decided which submitted films to accept.



Fact 1:  Within each category, the rate of acceptance for domestic films was the same as that for foreign films.



Fact 2:  The overall rate of acceptance of domestic films was significantly higher than that of foreign films.



In light of the background information, which of the following, if true, can account for fact 1 and fact 2 both being true of the submissions to this year’s Barbizon Film Festival?


  • In each category, the selection panel was composed of filmmakers, and some selection panels included no foreign filmmakers.

  • Significantly more domestic films than foreign films were submitted to the festival.

  • In each of the past three years, the overall acceptance rate was higher for foreign than for domestic films, an outcome that had upset some domestic filmmakers.

  • The number of films to be selected in each category was predetermined, but in no category was it required that the acceptance rate of foreign films should equal that of domestic films.

  • Most foreign films, unlike most domestic films, were submitted in categories with high prestige, but with correspondingly low rates of acceptance.


在时间很短的情况下做这种题目我觉得举极端情况的例子最好.题目里说有十个不同的组别,在E 选项里,我们就举两个好了,对国内国内的电影来说.第一组的通过率都为80%,第二组要求高点,通过率只有20%,如果国内电影全部跑到第一组去了,国外的全部去第二组了,那么很显然最后的结果是国内电影的通过率要远远高于国外电影的通过率,虽然在每一组当中各自的通过率都是一样的.

再看B,即使国内电影数量大大超过国外电影,如果国内的全部去第二组,国外的去第一组,那么结果就与题目的条件2相反了.所以E 是关键
-- by 会员 茉莉清茶 (2007/8/2 20:43:00)



例子最清楚,顶!!
39#
发表于 2010-1-7 00:15:52 | 只看该作者

其实还是理解fact1和fact2含义

right
40#
发表于 2010-3-13 10:55:57 | 只看该作者
很多题都是没读明白造成的。拐来拐去的。其实练来练去也就那些东西……唉~
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