【GMAT考满分数学PS题库】In a certain population, there are 3 times as many_真题_答案_解析 GMAT考满分官网

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In a certain population, there are 3 times as many people aged 21 or under as there are people over 21. The ratio of those 21 or under to the total population is

A1 to 2
B1 to 3
C1 to 4
D2 to 3
E3 to 4

正确答案: E

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