34C4/36C6
2nd attempt: ans: 1/42
所有跟帖:
•
觉得还是1(36X35)
-吃睡长-
♀
(241 bytes)
()
05/04/2009 postreply
20:15:46
•
u confused "nCr" & "nPr"
-Rafale-
♂
(0 bytes)
()
05/04/2009 postreply
20:41:30