you should be know:4p(23)=1,as p(23)=p(32)=p(24)=p(43)

If the question is changed from p(11),...p(55)to p(23),...p(43).Your method...
But 1/3 may be is right from computer.

所有跟帖: 

回复:you should know:4p(23)=1,as p(23)=p(32)=p(24)=p(43) -jinjing- 给 jinjing 发送悄悄话 (0 bytes) () 04/01/2010 postreply 14:55:22

请您先登陆,再发跟帖!