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题目材料:
Student Enrollment at a Small College
Distribution of Enrollment by Class and Residency
Total Enrollment: 1,400

Percent of Total Enrollment Majoring in Selected Academic Areas

Note: No student is majoring in more than one area.
Approximately what percent of the nonresidents are juniors?
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A.16%
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B.18%
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C.20%
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D.21%
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E.25%
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