“其中一个人”是特指某一个人还是泛指任一个人?
“一对”是特指2张,还是>=2都算?
如果是特定某人,=2,概率为C(8,2)*C(100,25)/C(108,27)
如果是特定某人,>=2,概率为C(8,i)*C(100,27-i)/C(108,27)累加i从2到8
如果是任一人,>=2,概率为1
如果是任一人,=2,概率为:
[c(8,2)*c(100,25)*c(75,27)*c(48,27)+c(8,2)*c(6,1)*c(100,25)*c(75,27)*c(48,26)+c(8,2)*c(6,3)*c(100,25)*c(75,27)*c(48,24)+c(8,2)*c(6,1)*c(5,1)*c(100,25)*c(75,26)*c(49,26)+c(8,2)*c(6,2)*c(100,25)*c(75,25)*c(50,27)+c(8,2)*c(6,2)*c(4,1)*c(100,25)*c(75,25)*c(50,26)+c(8,2)*c(6,2)*c(4,2)*c(100,25)*c(75,25)*c(50,25)]/[c(108,27)*c(81,27)*c(54,27)]