2016 AMC 8 第 12 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
12.
杰斐逊中学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?
小提示：
选一个方便且相等的男生和女生人数
Choose a convenient equal number of boys and girls.
大提示：
用 名男生和 名女生可以让两个分数都变成整数
Using boys and girls makes both fractions whole numbers.
视频讲解：
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文字解答：
假设有 名女生和 名男生，那么参加实地考察的有 名女生和 名男生，所以参加者中女生所占的比例是 。
所以正确答案是 B。
Suppose there are girls and boys. Then girls and boys go on the field trip, so the fraction of field-trip students who are girls is
Thus, B is the correct answer.
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