帮忙解释一下GWD-13-07,19

刚开始复习数学 过去学的都还给老师了～～～～～～

下面这两道题是关于中位数的吗？帮忙解析一下吧～

Q7:我选的是E，错在哪里？

For a certain race, 3 teams were allowed to enter 3 members each. A team earned 6 – n points whenever one of its members finished in nth place, where 1 ≤ n ≤ 5. There were no ties, disqualifications, or
            withdrawals. If no team earned more than 6 points, what is the least possible score a team could have earned?

A.
            0

B.
            1

C.
            2

D.
            3

E.  4

Q19:

有图的 可惜粘不上 大家都有题的吧 帮忙看看好吗 我怎么做都是C,答案却是E,不明白

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

E. 6

Q19:

有图的 可惜粘不上 大家都有题的吧 帮忙看看好吗 我怎么做都是C,答案却是E,不明白

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

E. 6

第七题，让两支队伍的得分为6，另一支队伍的得分就会尽量低，因此得分为1+5=6，2+4=6，3

因此得分最低的队伍得分为3，选D。

第十九题，原题给出了频率表。共35人，中数应是第18人的小时数。因此确定第18人落在哪个小时上即可。

付出7小时的有10人，付出6小时的有9人，因此第18人的小时数是6小时，选e。

原来第7题是问一个组最少会得多少分是吗？我理解错了 以为问一个组最不可能得的分数是几分 唉~~~

谢谢了～