试题来源:2012年新GRE数学考试模拟练习题(2)
【分析解答题】There are 1200 respondents to a poll, each favoring their preference for candidates A,B, and C. 54% favored A, 48% favored B, and 42% favored C, and there is 30% favored both A and B. what’s the largest possible number of respondents favoring C, but not C&B, nor C&A?
(A) 25%
(B) 30%
(C) 28%
(D) 38%
(E) 40%
网考网解析:
解:A和B的并集为:54%+48%-30%=72%,所C为28%. 查看试题解析出处>>
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