[讨论]2007年6月MATH机经讨论稿二(26-50)

dane_wu

辛苦了

chenjiayin

3Q3Q!

dane_wu

辛苦

NaMei

插一句哈~那个31题关于候选人的问题 我觉得应该选b吧？

而且刚才在gwd里面找了一道似乎是一样的题：

 

 

	Favorable	Unfavorable	Not Sure
Candidate M	40	20	40
Candidate N	30	35	35

 

The table above shows the results of a survey of 100 voters each responded “favorable” or “unfavorable” or “not sure” when asked about their impressions of candidate M and of candidate N.  What was the number of voters who responded “favorable” for both candidates?

(1)
            The number of voters who did not respond “favorable” for either candidate was 40.

(2)
              The number of voters who responded “unfavorable” for both candidates was 10.

chamcham

以下是引用NaMei在2007-6-29 21:31:00的发言：

插一句哈~那个31题关于候选人的问题 我觉得应该选b吧？

而且刚才在gwd里面找了一道似乎是一样的题：

 

 

 

 

	Favorable	Unfavorable	Not Sure
Candidate M	40	20	40
Candidate N	30	35	35

 

 

The table above shows the results of a survey of 100 voters each responded “favorable” or “unfavorable” or “not sure” when asked about their impressions of candidate M and of candidate N.  What was the number of voters who responded “favorable” for both candidates?

(1)
   The number of voters who did not respond “favorable” for either candidate was 40.

(2)
     The number of voters who responded “unfavorable” for both candidates was 10.

yeah, B

uk_xisherrya

怎么看不到后面的题?

风临左岸

以下是引用chamcham在2007-7-1 4:56:00的发言：

yeah, B

我怎么算出来是A,画图可以画出来的，因为对M和N，都没选支持的是40人，对M来说，不支持和没表态的总共是20＋40＝60，所以60－40＝20既对N支持，但对M不支持和没表态的，所以支持N，又支持M的30－20＝10

A	B	C
	D	E
	F	G

不知道怎么插入，将就着看吧，行1是favorable N的，行2是unfavorable N的，行3是not sure N的，同理，列1是favorable M的，列2是unfavorable M的，列3是not sure M的，由条件1知D+E+F+G=40，所以B+C=20+40-40=20 所以A=30-20=10. A既对M和N都favorable的

jereste

谢谢

jereste

thanks

holley

谢谢