还是比较弱的问题……
83、97 students take apart in a test and the median score is 85.Which of the following descriptions must be correct?
(1)At least 49 students'score are equal to or more than 85
(2)At least 49 students'score are less than 85
(3)At most 49 students'score are equal to or more than 85
【答案】(1)
【思路】
median就是先排序,后取中的数…85…,所以应该是at least 49个学生成绩大于或等于85的。
为什么不能选(3)? 我感觉在这道题中,at most 和at least的区别不大啊!
举报
at most 可以所有人都>=85, 因为大家可以都是85分
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