N个骰子和(骰子和:n个骰子向上面的数字和;比如掷3颗骰子出现1、4、3,则骰子和为8)计算是个难题,随着骰子的怎多出现结果也随着增多,纠结了很久终于想出用列表的方式来计算概率。
优点:可以计算任意颗骰子的骰子和的概率,计算简单,正确率大,可以用计算机。缺点:工作量大。
一颗骰子概率
1 | 2 | 3 | 4 | 5 | 6 |
1/6 | 1/6 | 1/6 | 1/6 | 1/6 | 1/6 |
两颗骰子机会表
由一颗骰子概率表横纵排列
y x | 1 | 2 | 3 | 4 | 5 | 6 |
1 | 2: 1/36 | 3: 1/36 | 4: 1/36 | 5: 1/36 | 6: 1/36 | 7: 1/36 |
2 | 3: 1/36 | 4: 1/36 | 5: 1/36 | 6: 1/36 | 7: 1/36 | 8: 1/36 |
3 | 4: 1/36 | 5: 1/36 | 6: 1/36 | 7: 1/36 | 8: 1/36 | 9: 1/36 |
4 | 5: 1/36 | 6: 1/36 | 7: 1/36 | 8: 1/36 | 9: 1/36 | 10: 1/36 |
5 | 6: 1/36 | 7: 1/36 | 8: 1/36 | 9: 1/36 | 10: 1/36 | 11: 1/36 |
6 | 7: 1/36 | 8: 1/36 | 9: 1/36 | 10: 1/36 | 11: 1/36 | 12: 1/36 |
两颗骰子概率表
相同事件括号里面概率相加即为此事件的概率,如:出现4点的概率即3个1/36。
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
1/36 | 2/36 | 3/36 | 4/36 | 5/36 | 6/36 | 5/36 | 4/36 | 3/36 | 2/36 | 1/36 |
三颗骰子机会表
由两个骰子概率表和一颗骰子概率表横纵排列
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
1 | 3: 1/216 | 4: 2/216 | 5: 3/216 | 6: 4/216 | 7: 5/216 | 8: 6/216 | 9: 5/216 | 10: 4/216 | 11: 3/216 | 12: 2/216 | 13: 1/216 |
2 | 4: 1/216 | 5: 2/216 | 6: 3/216 | 7: 4/216 | 8: 5/216 | 9: 6/216 | 10: 5/216 | 11: 4/216 | 12: 3/216 | 13: 2/216 | 14: 1/216 |
3 | 5: 1/216 | 6: 2/216 | 7: 3/216 | 8: 4/216 | 9: 5/216 | 10: 6/216 | 11: 5/216 | 12: 4/216 | 13: 3/216 | 14: 2/216 | 15: 1/216 |
4 | 6: 1/216 | 7: 2/216 | 8: 3/216 | 9: 4/216 | 10: 5/216 | 11: 6/216 | 12: 5/216 | 13: 4/216 | 14: 3/216 | 15: 2/216 | 16: 1/216 |
5 | 7: 1/216 | 8: 2/216 | 9: 3/216 | 10: 4/216 | 11: 5/216 | 12: 6/216 | 13: 5/216 | 14: 4/216 | 15: 3/216 | 16: 2/216 | 17: 1/216 |
6 | 8: 1/216 | 9: 2/216 | 10: 3/216 | 11: 4/216 | 12: 5/216 | 13: 6/216 | 14: 5/216 | 15: 4/216 | 16: 3/216 | 17: 2/216 | 18: 1/216 |
三颗骰子概率表
相同事件括号里面概率相加即为此事件的概率,如:出现5点的概率即3/216+2/216+1/216。
3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
1/216 | 3/216 | 6/216 | 10/216 | 15/216 | 21/216 | 25/216 | 27/216 | 27/216 | 25/216 | 21/216 | 15/216 | 10/216 | 6/216 | 3/216 | 1/216 |
四颗骰子机会表
由两个骰子概率表横纵排列
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
2 | 4:1/1296 | 5:2/1296 | 6:3/1296 | 7:4/1296 | 8:5/1296 | 9:6/1296 | 10:5/1296 | 11:4/1296 | 12:3/1296 | 13:2/1296 | 14:1/1296 |
3 | 5:2/1296 | 6:4/1296 | 7:6/1296 | 8:8/1296 | 9:10/1296 | 10:12/1296 | 11:10/1296 | 12:8/1296 | 13:6/1296 | 14:4/1296 | 15:2/1296 |
4 | 6:3/1296 | 7:6/1296 | 8:9/1296 | 9:12/1296 | 10:15/1296 | 11:18/1296 | 12:15/1296 | 13:12/1296 | 14:9/1296 | 15:6/1296 | 16:3/1296 |
5 | 7:4/1296 | 8:8/1296 | 9:12/1296 | 10:16/1296 | 11:20/1296 | 12:24/1296 | 13:20/1296 | 14:16/1296 | 15:12/1296 | 16:8/1296 | 17:4/1296 |
6 | 8:5/1296 | 9:10/1296 | 10:15/1296 | 11:20/1296 | 12:25/1296 | 13:30/1296 | 14:25/1296 | 15:20/1296 | 16:15/1296 | 17:10/1296 | 18:5/1296 |
7 | 9:6/1296 | 10:12/1296 | 11:18/1296 | 12:24/1296 | 13:30/1296 | 14:36/1296 | 15:30/1296 | 16:24/1296 | 17:18/1296 | 18:12/1296 | 19:6/1296 |
8 | 10:5/1296 | 11:10/1296 | 12:15/1296 | 13:20/1296 | 14:25/1296 | 15:30/1296 | 16:25/1296 | 17:20/1296 | 18:15/1296 | 19:10/1296 | 20:5/1296 |
9 | 11:4/1296 | 12:8/1296 | 13:12/1296 | 14:16/1296 | 15:20/1296 | 16:24/1296 | 17:20/1296 | 18:16/1296 | 19:12/1296 | 20:8/1296 | 21:4/1296 |
10 | 12:3/1296 | 13:6/1296 | 14:9/1296 | 15:12/1296 | 16:15/1296 | 17:18/1296 | 18:15/1296 | 19:12/1296 | 20:9/1296 | 21:6/1296 | 22:3/1296 |
11 | 13:2/1296 | 14:4/1296 | 15:6/1296 | 16:8/1296 | 17:10/1296 | 18:12/1296 | 19:10/1296 | 20:8/1296 | 21:6/1296 | 22:4/1296 | 23:2/1296 |
12 | 14:1/1296 | 15:2/1296 | 16:3/1296 | 17:4/1296 | 18:5/1296 | 19:6/1296 | 20:5/1296 | 21:4/1296 | 22:3/1296 | 23:2/1296 | 24:1/1296 |
四颗骰子概率表
相同事件括号里面概率相加即为此事件的概率,如:出现6点的概率即3/1296+4/1296+3/1296。
4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
1 1296 | 4 1296 | 10 1296 | 20 1296 | 35 1296 | 56 1296 | 80 1296 | 104 1296 | 125 1296 | 140 1296 | 146 1296 | 140 1296 | 125 1296 | 104 1296 | 80 1296 | 56 1296 | 35 1296 | 20 1296 | 10 1296 | 4 1296 | 1 1296 |
一次类推可以求出任何个骰子骰子和概率,特别提醒:求多颗骰子的骰子和概率可以多种求法,比如求6颗骰子的概率可以用两个颗三颗骰子概率表横纵排列求6颗骰子的机会表,同样也可以选择四颗骰子和两颗骰子概率表横纵排列。
如果你还怀疑,可以通过实验验证上面概率。比如你可以掷2颗骰子50000次,看是否出现点子的频率是否符合上面理论值
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