費費第7部分83題

goodfishs

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)

应该(3)?the median 之后的人数应只有48人？

nbnhjf

首先你应该了解median和mean的区别，明白了定义你就明白了这道题目。

说简单点：97个人分数都是85的话，median＝85，同时排除2）排除3）

说白了，这道题目考的就是median的定义，你再去看看。OG前面有解释。

goodfishs

thanks  a  lot !!!!