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ccy_111 发表于 2008-7-19 14:38

请教GWD----13数学

[font=Times New Roman][size=3]Q7:[/size][/font]
[size=3][font=Times New Roman]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 [/font][font=宋体]≤[/font][font=Times New Roman] n [/font][font=宋体]≤[/font][font=Times New Roman] 5.
There were no ties, disqualifications, or[/font]
[font=Times New Roman]withdrawals.
If no team earned more than 6 points, what is the least possible score a team could have earned?[/font][/size]
[font=Times New Roman][size=3] [/size][/font]
[font=Times New Roman][size=3]A.[/size]
[size=3]0[/size][/font]
[font=Times New Roman][size=3]B.[/size]
[size=3]1[/size][/font]
[font=Times New Roman][size=3]C.[/size]
[size=3]2[/size][/font]
[font=Times New Roman][size=3]D.[/size]
[size=3]3[/size][/font]
[font=Times New Roman][size=3]E.[/size]
[size=3]4[/size][/font]
[font=Times New Roman][size=3]Answer:    3 [/size][/font]
[font=Times New Roman][size=3][/size][/font]
[font=Times New Roman][size=3][/size][/font]
[font=Times New Roman][size=3]题目怎么理解呀？怎么解出来就是3呢？[/size][/font]
[font=Times New Roman][size=3][/size][/font]
[font=Times New Roman][size=3]谢谢！[/size][/font]

countto307 发表于 2008-7-19 16:05

the total scores of the race muct be 15 (as 1 ≤ n ≤ 5, and 5+4+3+2+1=15), let's say A+B+C =15 (A,B,C each represents the scores of the team)
If no team earned more than 6, which means than no 2 teams earned more than 12, so we may conclude that no team earned less than 3

ccy_111 发表于 2008-7-20 00:33

不过，，这句A team earned 6 – n points whenever one of its members finished in nth place,是什么意思呀？

WALL-E 发表于 2008-7-20 03:23

是说一个队，如果它的队员得了第n名（1 ≤ n ≤ 5），这个队就得到6-n分

ccy_111 发表于 2008-7-20 16:59

也就是说，只有名次在1---5之间才有机会得分？如此，整个比赛的发放分数是15.

awaylily 发表于 2008-7-26 00:51

~~

你的GWD数学哪里找到的，能给我一份么？正在找呢~~

portiapw 发表于 2008-7-28 01:00

回复 5# ccy_111 的帖子

对的

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