2007 AMC 8 第 17 题
先试着解答 2007 AMC 8 第 17 题，然后核对你的答案与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2007 AMC 8 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
17.
升油漆混合物中有 红色颜料、 黄色颜料和 水。向原混合物中加入五升黄色颜料。新混合物中黄色颜料占百分之多少？
A mixture of liters of paint is red tint, yellow tint and water. Five liters of yellow tint are added to the original mixture. What is the percent of yellow tint in the new mixture?
小提示：
先求原混合物中黄色颜料有多少升
Find the original number of liters of yellow tint.
大提示：
加入黄色颜料后，黄色颜料量和总混合物量都会改变
After adding yellow tint, both the yellow amount and the total mixture amount change.
解答：
原混合物中黄色颜料为 升。加入 升后，黄色颜料共有 升。
新混合物总量为 升，所以黄色颜料百分比为
所以正确答案是 C。
The amount of yellow tint in the original mixture is liters. Adding liters results in a total of liters of yellow tint.
The new mixture has a total of liters, so the percent of yellow tint is
Thus, C is the correct answer.
其他年份的第 17 题
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