求助一道数学题目！！！

grassgreen

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

Answer: d

怎么做啊 ？？

barmecider

一共9各队员 1st -9 th
等分是5，4，3，2，1，0，0，0，0
想要找最少分得
最高分的是 5，1，0
其次是4，2，0
那么剩下的就是最少的3，0，0=3
或者说 一共的是15分 最高分不能超过6 那么就是15-6-6=3

grassgreen

谢谢啦！终于弄明白了！