✔ 最佳答案
There are total 24 possibilities.
For A, if he gets 3 or 4 marks, he should win
if he gets 2 marks, then he will win except B gets 4 marks
if he gets 1 marks, then he can not win except B, C, D gets 2,3,4 marks
P(A will be the final winner)
= (6 + 6 + 4 + 5)/24
= 22/24
= 11/12
Similarly, P(B will be the final winner)
= 2/24
= 1/12
2011-12-29 12:28:50 補充:
Sorry. P(A will be the final winner)
= (6 + 6 + 4 + 1)/24
= 17/24