回複:回複:回複:5/36

來源: 2010-02-07 07:52:16 [舊帖] [給我悄悄話] 本文已被閱讀:

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.