ＭＡＴＨ ＪＪ １１８

gpc7109

118. PS.版本一：A research station records the temperature of each day for a whole year, from Oct 1st through Sep 30th.
For the first 182 days, lowest value 1 degree, median 29 degrees, highest temperature 41 degrees.
For the left 183 days, lowest temperature 38 degrees, median 71 degrees, highest 90 degrees.
Which of the following is a possible median of the whole year's temperature?
A. 36
B. 39
C. 43
D. 47

哪位可以帮忙解答一下，为什么答案是Ｂ。

babee2queen

前182天最高到了41  （n,41）

后183天最低到了38  (38,m)

(38,41)是一个前后都覆盖了的面积，而且41前的数字数量约等于38后面的数字数量

按顺序排队，median肯定在【38，41】里面

觉得自己表达能力不太好……希望说说到点上……