✔ 最佳答案
2幅啤牌=104張card,
1st 張得到(花)的機會是 : 104/104
2nd 張得到同(花)的機會是:104/104 * (26-1)/103
3rd 張得到同(花)的機會是: 104/104 * (26-1)/103 * (26-2)/102
4th 張得到同(花)的機會是: 104/104 * (26-1)/103 * (26-2)/102 * (26-3)/101
5th 張得到同(花)的機會是: 104/104 * (26-1)/103 * (26-2)/102 * (26-3)/101 * (26-4)/100
>=25*24*23*22/103*102*101*100
= 303600/106110600
=0.0028611656
2007-03-07 15:20:32 補充:
1st 張得到(花)的機會是 : 104/104 (since any card is ok)2nd 張得到同(花)的機會是:(26-1)/103 (since only 25張 同花 out of 103張)3rd 張得到同(花)的機會是: (26-2)/102 4th & 5th 張得到同(花)的機會是: same as above同時取出5張,得到(花)的機會是=104/104 * (26-1)/103 * (26-2)/102 * (26-3)/101 * (26-4)/100