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  3. A newspaper polled 1,000 likely voters about which of the following issues, if any, played an important role in their decision-m

A newspaper polled 1,000 likely voters about which of the following issues, if any, played an important role in their decision-m

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问题
   A newspaper polled 1,000 likely voters about which of the following issues, if any, played an important role in their decision-making process for an upcoming election: education, crime, and/or taxes. Of the voters surveyed, a total of 495 named education, 490 named crime, and 440 named taxes. In the figure above, the overlapping areas between two circles represent the people who named only those two items; the overlapping area between the three circles represents those people who named all three issues.  
What percentage of those polled named only education or only crime but no other issue?
选项 A、25.5%
B、31.5%
C、39%
D、55%
E、98.5%
答案C
解析 First, you need to determine the number of people who named only crime and only education: crime only=490-(60+125+140)=165; education only=495-(60+125+85)=225; 165+225=390. 390 is 39% of 1,000.
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