◎ 题干
There is 1000 grams of alcohol solution with the concentration of 15% inthe bottle,and now wepour 200 grams of alcohol solution A and 400 grams of alcohol solution B respectively,the concentration turns to 14%.the concentration of A is twice as much as the concentration of B.What’s the concentration of alcohol solution A?
瓶中装有浓度为15%的酒精溶液1000克,现在又分别倒入200克和400克的A、B两种酒精溶液,瓶中的浓度变为14%.已知A种酒精溶液是B种酒精溶液浓度的2倍,那么A种酒精溶液的浓度是多少?
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Thereis1000gramsofalcoholsolutionwiththeconcentrationof15%inthebottle,andnowwepour200gramsofalcoholsolutionAand400gramsofalcoholsolutionBrespectively,theconcen…”主要考查了你对  【百分数的计算,百分数的应用题】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。