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标题: 303求解 [打印本页]

作者: caoyichao    时间: 2010-8-18 16:35
标题: 303求解
303  某种植物,感染真菌并且死掉的有15% (infested fungus and die平行的。。。我看得很清楚), 染上fungus但是没有死的有40%,问感染真菌的植物有多少? 我选 55%
V2  原文大概是:15 percent of a kind of plant infested fungus and die. 40% percent of the plants that infested fungus do not die. What percentage of the plants infested?对!没错儿!是说感染了蘑菇的有40%没死所以应该设总共是x,于是100%*x*(1-40%)=15%, x=25%

15 percent of a kind of plant infested fungus and die. 40% percent of the plants that infested fungus do not die. What percentage of the plants infested这段话到底该怎么理解哇 这俩提答案不一样原因就是理解地不一样
作者: dream23    时间: 2010-8-18 16:47
是啊。。我也在纠结这个问题
作者: caoyichao    时间: 2010-8-18 16:54
其实数学也不简单,都是文字游戏~~




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