下面是答案

jinjing 2010-09-23 23:37:36 ( reads)

一对儿 C(13,4)C(4,2)C(4,1)C(4,1)C(4,1)C(4,1)/)C(52,5=0.422569
三条 C(13,3)C(4,3)4^3/C(52,2)=0.0281713
一对儿加三条 C(13,2)C(4,2)C(4,3)P(2,2)/C(52,2)=0.0007203