u confused "nCr" & "nPr"

回答: 2nd attempt: ans: 1/42Rafale2009-05-04 19:21:57

所有跟帖: 

O -吃睡长- 给 吃睡长 发送悄悄话 (0 bytes) () 05/05/2009 postreply 01:12:23

请您先登陆,再发跟帖!