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【OG20-P277-279题】
Do at least 60 percent of the students in Pat’s class walk to school?
(1) At least 60 percent of the female students in Pat’s class walk to school.
(2) The number of students in Pat’s class who walk to school is twice the number of students who do not walk to school
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条件1:男生人数未知,不充分
条件2:walk+not walk=100%,walk=2 not walk=2/3>60%,充分
题目讨论 (3条评论)

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192219e
我以为(1)60% 女学生走路去上学,是占全部比例······ 好吧,是女学生中的60%是走路···
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0 回复 2020-12-22 14:50:32
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emily666
条件2可以回答 是
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0 回复 2020-05-10 19:41:17
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Shawna
条件一:无法知道女生在全部学生中的比例 无法得出 条件二:走路学生是不走路学生的两倍,可以回答问题 不是
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0 回复 2017-10-02 15:17:52
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( ¨̮ )回复Shawna
条件二不是 是 吗?
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0 回复 2018-04-08 17:47:48
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