2014 AMC 8 第 7 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。
7.
Raub 女士班上有 名学生，女生比男生多四人。班上女生人数与男生人数之比是多少？
There are four more girls than boys in Ms. Raub’s class of students. What is the ratio of the number of girls to the number of boys in her class?
小提示：
设男生人数为
Let the number of boys be .
大提示：
女生人数为 ，总人数为
Then the number of girls is , and the total is .
解答：
设班上男生人数为 ，则女生有 人。因为共有 名学生，因此女生与男生之比为 。
所以正确答案是 B。
Let be the number of boys in the class. This means that there are girls. As there are students, we know that: Therefore, the ratio of girls to boys is
Thus, B is the correct answer.
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