prep 198

hebelong

198.
19263-!-item-!-187;#058&012213



Did one of the 3 members of a certain team sell at least 2 raffle tickets yesterday?







(1)The 3 members sold a total of 6 raffle tickets yesterday.

(2)No 2 of the members sold the same number of raffle tickets yesterday.
答案为D

条件2怎么理解？不明白呢，谢谢你们的帮忙！

hebelong

木有了~解说中写条件二“（a,b,c）={(0,1,2)(1,2,3)(3,4,5)}”
我完全理解不了