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

來源: 於 2010-04-01 14:53:52 [舊帖] [給我悄悄話] 本文已被閱讀：次

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.