以下是引用yiketiezk在2008-11-5 22:10:00的发言:请大家帮忙给看一下 Six countries in a certain region sent a total of 75 representatives to an international congress, and no two countries sent the same number of representatives. Of the six countries, if Country A sent the second greatest number of representatives, did Country A send at least 10 representatives?
(1) One of the six countries sent 41 representatives to the congress.
(2) Country A sent fewer than 12 representatives to the congress. 答案给的E??!! (1) 75-41=34,如果A国送11个人去,其他四国可以是9,8,4,2 如果A国送9个人去,其他四国可以是8, 7, 6, 4 So, insufficient (2) 验证方式同上 所以答案是E |