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标题: [求助]OG11 Diagnostic Test 45 [打印本页]

作者: lingdangyour 时间: 2008-5-26 06:58 标题: [求助]OG11 Diagnostic Test 45

DS:

Of the 66 people in a certain auditorium,at most 6 people have birthdays in any one given month.Does at least one person in the auditorium have a birthday in Jan.?

(1)More of the people in the auditorium have birthdays in Feb. than in March.

(2)Five of the people in the auditroium have birthdays in March.

答案是D,始终没看明白OG的解释,哪位NN可以帮忙解答一下,万分感谢!

作者: IORIYAGAMI 时间: 2008-5-26 21:18

1)Feb的人比Mar的人多，说明Mar的人最多5个，剩下61个人其余11个月分的话，就算其他月份达到最大6个，Jan至少还有一个
2）同样，Mar只有5个，61人11个月分的话，Jan无论如何有一个以上

作者: almarabbit08 时间: 2008-5-27 19:28

同意！

作者: lingdangyour 时间: 2008-5-30 20:50

明白了,谢谢!! 

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