AMC 8 1989 Problem 9

AMC8 1989 年第 9 题

比与比例★★☆☆☆

There are 2 boys for every 3 girls in Ms. Johnson's math class. If there are 30 students in her class, what percent of them are boys?

的数学班上每 2 个男生对应 3 个女生。如果她班上有 30 名学生，男生占百分之多少？

A.12%
B.20%
C.40%
D.60%
E. $\displaystyle 66\frac{2}{3}\%$

正确答案 · Correct Answer

C

解析 · Solution

解析整理中

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