数学问题~~~~

徐小涵 · 发表于 2013-10-30 15:05:30

A marketing firm determined that of 200 households surveyed, 80used neither Brand A nor Brand B soap,60 used only Brand A soap. and for every household that used both brands of soap,3 used only Brand B soap. How many of the 200 households surveyed used both brands of soap?

(A)15
(B)20
(C)30
(D)40
(E)45

求指导翻译题目啊看不懂啊本人小白谢谢各位

徐小涵 · 发表于 2014-4-16 22:45:10

melod_gogogo 发表于 2013-12-16 15:41
你是JN的小涵嘛！！！！

JN是啥？！

melod_gogogo · 发表于 2013-12-16 15:41:01

你是JN的小涵嘛！！！！

数学问题~~~~

所属分类: GMAT考试

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