P(3) × C(10, 3); C(18, 3)

? :P

所有跟帖: 

thanks -donz94086- 給 donz94086 發送悄悄話 (0 bytes) () 02/19/2007 postreply 20:00:18

haha, misread one info. The revised answer --> -ppzcgg- 給 ppzcgg 發送悄悄話 ppzcgg 的博客首頁 (520 bytes) () 02/21/2007 postreply 10:50:31

2) C(18, 3) × C(15, 3) × C(12, 3) × C(9, 3) × C(6, 3) × C(3 -ppzcgg- 給 ppzcgg 發送悄悄話 ppzcgg 的博客首頁 (82 bytes) () 02/21/2007 postreply 11:45:40

請您先登陸,再發跟帖!