Gmat Problem solving

来源：学生作业帮编辑：搜狗做题网作业帮分类：数学作业时间：2024/06/14 02:51:04

Gmat Problem solving
一个罐子里都是纯酒精,a同学第一次倒出1/2,加满水,又倒出1/3,加满水,又倒出1/4,加满水,问最后酒精纯度?

设容量为1
那么第一次加满水后酒精含1-(1/2)=1/2
第二次加满水后酒精含1/2*(2/3)=1/3
第三次加满水后酒精含1/3*(3/4)=1/4
所以最后酒精纯度25%.

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