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The recreation director at a local youth club surveyed the members to determine interest in two activities—a hiking trip and a softball game. Of the members surveyed, 60 percent were interested in the hiking trip and 75 percent were interested in the softball game. Of those who were interested in the softball game, $$\frac{2}{3}$$ were also interested in the hiking trip. What percent of the members surveyed were not interested in either of the two activities?
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· 相关考点
6.1.2 双集合交并补集关系
【相关术语】 • A, not A：A与非A • B, not B：B与非B • A, non A：A与非A • have A, have never A：A与非A • scented, unscented：有味道VS无味道 • male, female：男VS女 • on campus, off campus：住校VS不住校 【考察角度】 考察角度一：九宫格求具体值 • 当题目中存在两个概念分别的正向、反向描述 • 第⼀步：画出九宫格 • 第⼆步：按照A与非A，B与非B两种分类标准，将所有数据分成四⼤类 • 第三步：填⼊题⽬给出数据，计算剩余数据 考察角度二：九宫格求范围 • 当题目中存在两个概念分别的正向、反向描述 • 第⼀步：画出九宫格 • 第⼆步：按照A与非A，B与非B两种分类标准，将所有数据分成四⼤类 • 第三步：填⼊题⽬给出数据，根据每行每列的部分量≤每行每列的总量，计算剩余数据的取值范围
以上解析由 考满分老师提供。
