[求助]OG11 Diagnostic Test 45

loybo

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!

phenomena

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

loybo

明白了,谢谢!!