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小的不才,问一题数学

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楼主
发表于 2011-11-5 23:47:55 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Q33:

         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.
    
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Answer:
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沙发
发表于 2011-11-6 00:24:20 | 只看该作者
小弟初步看了一下,A
请批评指正。
板凳
 楼主| 发表于 2011-11-6 00:59:43 | 只看该作者
答案是C
地板
发表于 2011-11-6 01:01:41 | 只看该作者
Favorable Unfavorable Not Sure
Candidate M 40 20 40
Candidate N 30 35 35

(1) The number of voters who did not respond “favorable” for either candidate was 40.
就是说选了FAVORABLE的有100-40=60人,但上表中有40+30=70人次,所以70-60=10人是responded “favorable” for both candidates

(2) The number of voters who responded “unfavorable” for both candidates was 10.算不出
5#
发表于 2011-11-6 06:53:46 | 只看该作者
同意3楼答案,应该是A吧。
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