我今天做了一套GWD的数学题,其中有一道DS题,到现在还没有想通,请大家帮忙解答,谢谢!
34:Professor Vásquez gave a quiz to two classes. Was the range of scores for the first class equal to the range of scores for the second class?
(1) In each class, the number of students taking the quiz was 26, and the lowest score in each class was 70.
(2) In each class, the average (arithmetic mean) score on the quiz was 85.
参考答案选E。
两个条件独立不能解答,这个我可以理解,但是把两个条件联系起来,就可以知道,两个班的人数一样,平均分一样,还有最低分也一样,那应该最高分也一样才对啊。所以rang也应该相同,我选C。但是为什么答案选E呢?是不是我那里想错了?请大家帮帮忙,谢谢!
(2) In each class, the average (arithmetic mean) score on the quiz was 85.
参考答案选E。
两个条件独立不能解答,这个我可以理解,但是把两个条件联系起来,就可以知道,两个班的人数一样,平均分一样,还有最低分也一样,那应该最高分也一样才对啊。所以rang也应该相同,我选C。但是为什么答案选E呢?是不是我那里想错了?请大家帮帮忙,谢谢! |