9。 有一图表, like that
Question----Yes----No----Not answer
------1------* ----100---- *
------2----- *-----140---- *
200人回答2个问题, 已知有60人回答No to both questions, how many people answer no to just one question? 180 (* 表示不记得了,但我觉得不重要)
[讨论]:感觉题目不全,但应该是集合方面的题
我覺得答案是120.
(100-60)+(140-60)=120
[此贴子已经被作者于2003-3-26 18:19:44编辑过] |