作者nashnash (新手上站)
看板GRE_Verbal
标题[计量] b book 的数学问题
时间Mon Aug 20 22:45:38 2007
先谢谢大家帮我解决
以下是题目
By weight, liquid A makes up 7.0 percent of solution I and 14.5 percent
of solution II. If 3 grams of solution I is mixed with 2 grams of solution
II, then liquid accounts for what percent of the weight of the resulting
solution?
(A) 6.09%
(B) 10%
(C) 10.75%
(D) 21.5%
(E) 50% ans:B
谢谢
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 218.164.12.175
1F：→ federline:Liquid A在溶液I和II的分重相加除以总重 74.64.44.188 08/20 22:49
2F：→ federline:(3*7%+2*14.5)/(3+2)=10% 74.64.44.188 08/20 22:52
3F：→ nashnash:谢谢 218.164.6.124 08/21 01:58