送交者: Amsel 于 2006-07-26, 10:01:53:

回答: 改变一下思路：从两副牌中拿出两张红桃Q和两张黑桃Q， 由 Amsel 于 2006-07-26, 09:38:35:

• you are right: 1/4 only with infinite cards. (无内容) - chouqilozi (0 bytes) 2006-07-26, 10:05:15 (95681)
  • like 雅诗 pointed out. (无内容) - chouqilozi (0 bytes) 2006-07-26, 10:06:04 (95683)

加跟贴