In a sample of 800 high school students in which all students are either freshmen, sophomores, juniors, or seniors, 22 percent a

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问题 In a sample of 800 high school students in which all students are either freshmen, sophomores, juniors, or seniors, 22 percent are juniors and 74 percent are not sophomores. If there are 160 seniors, how many more freshmen than sophomores are there among the sample of students?

选项 A、42
B、48
C、56
D、208
E、256

答案B

解析 22 percent are juniors, 100-74=26 percent are sophomores, 160/800=20 percent are seniors, and therefore 100-(22+26+20)=32 percent are freshmen. 32 percent of 800=256 freshmen; 26 percent of 800=208 sophomores; 256 freshmen-208 sophomores=48 more freshmen than sophomores.

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In a sample of 800 high school students in which all students are either freshmen, sophomores, juniors, or seniors, 22 percent a

GMAT QUANTITATIVE

GMAT

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