Yesterday each of the 35 members of a certain task force spent some time working on project P. The graph shows the number of hours and the number of members who spent that number of hours working on project P yesterday. What was the median number of hours that the members of the task force spent working on project P yesterday?

A. 2

B. 3

C. 4

D. 5

6

这样的题目怎么解？

首先要明确median number的概念，也就是依次排序后中间那个数，或者中间两个数的算术平均数

那么题目中按照工作小时排序，有9个1，4个2，1个3，2个4，1个5，8个6，10个7，一共35个数，中间的那个数应该是第18个。9+4+1+2+1=17，第18个正好是6，或者从后往前数，第18个正好是最后一个6

希望能够消除疑惑