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  3. The following 3 question refer to the data above. The graph above shows how a sample of 10 different voters (vertical axis) vot

The following 3 question refer to the data above. The graph above shows how a sample of 10 different voters (vertical axis) vot

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问题
The following 3 question refer to the data above.

The graph above shows how a sample of 10 different voters (vertical axis) voted for 5 different candidates (horizontal axis). Each voter voted for either one or two of the five candidates (No voter voted twice for the same candidate). The two candidates receiving the most votes were the winners. The sample constituted 5 percent of those in the district who voted, and the number of votes in the district for each candidate was in the same proportion as the number of votes in the sample for each candidate.
选项 A、11/18
B、11/22
C、1/2
D、1/3
E、3/10
答案A
解析 标题：X地区一个选民样本的选举结果上面图表表明了10个不同的投票者(纵轴)，对5个不同的候选人的投票(横轴)选举样本。每个选民投票支持5个候选人中的某一个或某两个(没有投票者对同一候选人投2次票)。两个获得选票最多的候选人为获胜者。该样本占这个地区投票总人数的5％，并且这个地区每个候选人得到的选票的比例与该样本中的比例相同。
问：两个获胜者获得的选票占投票总数的比例是多少?
解：本题的正确答案是(A)。从图中可以看出两个获胜者是P和S，分别获得了5张和6张选票，而该样本中共有18张选票，所以获胜者获得的选票比例为11/18。
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