I was discussing this with my hu*****and - both of us were wrong...
thanks
所有跟帖:
• :) 这题应该是大学概率的水平,对中学生和小学生都太难了。 -小睿儿- ♀ (0 bytes) () 12/18/2010 postreply 17:58:20
• my大学概率score -iMe- ♀ (105 bytes) () 12/18/2010 postreply 18:03:42
• 谢谢!概率对很多人都来说都很难:) -小睿儿- ♀ (0 bytes) () 12/18/2010 postreply 18:05:52