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From 1997 to 1998 the number of students enrolled in advanced mathematics courses increased by the same percent that student enrollment in advanced mathematics courses dropped from 1996 to 1997. What was the approximate number of students enrolled in advanced mathematics courses in 1998?

单选题
2022-03-16 00:10
A、420
B、440
C、450
D、460
E、480
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正确答案
E
试题解析

From 1996 to 1997, the percent decrease was [(500-400)/500]×100% or 20%. If the percent increase from 1997 to 1998 was 20%, then the number of students enrolled in advanced mathematics courses in 1998 was 400+(20% of 400) = 400+80 = 480.
标签： 国外英语考试 美国学术能力评估考试（SAT）
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