回复:回复:回复:5/36

来源: 2010-02-07 07:52:16 [旧帖] [给我悄悄话] 本文已被阅读:

E={11,12,21,14,41,16,61,23,32,25,52,34,43,56,65}
P(E)=N(E)/N(S)=15/36=5/12.