Question

Jefferson Middle School 的男生和女生人数相同。女生中的四分之三和男生中的三分之二参加了实地考察。参加实地考察的学生中，女生占几分之几？

Jefferson Middle School has the same number of boys and girls. Three-fourths of the girls and two-thirds of the boys went on a field trip. What fraction of the students on the field trip were girls?

$\dfrac{1}{2}$

$\dfrac{9}{17}$

$\dfrac{7}{13}$

$\dfrac{2}{3}$

$\dfrac{14}{15}$

答案：B

知识点：分数比与比例

难度评级：1170

视频讲解：

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文字解答：

假设有 $12$ 名女生和 $12$ 名男生，那么参加实地考察的有 $9$ 名女生和 $8$ 名男生，所以参加者中女生所占的比例是 $\dfrac{9}{9+8}=\dfrac9{17}$ 。

所以正确答案是 B。

Suppose there are $12$ girls and $12$ boys. Then $9$ girls and $8$ boys go on the field trip, so the fraction of field-trip students who are girls is $\dfrac{9}{9+8}=\dfrac9{17}.$

Thus, B is the correct answer.

2016 AMC 8 第 12 题

答案：B

难度评级：1170

视频讲解：

文字解答：

其他年份的第 12 题