A researcher estimates that 10% of the children in the world are between the ages of 8~18 and dislike soccer, and that 50% of the children who like soccer are between the ages of 8 and 18. If 40% of the children in the worlds are between the ages of 8~18, what percentage of children in the world are under age 8 and dislike the game of soccer? (All children are between the ages of 0~18) 作者: emmahiggins09 时间: 2016-7-9 08:20
楼主画个韦恩表格不就行了么， 横向 like, dislike, total ；纵向 8-18 , 小于8 , total