数学难题
已知中国足球彩票中头奖(13场)的机会是3的13次方分一
请问中国足球彩票中二奖(12场)的机会是几分一?
.....................11场.............?
....................10场..............?
.....................9场.............?
....................8场..............?
....................7场.............?
....................6场..............?
....................5场.............?
....................4场..............?
....................3场..............?
....................2场.............?
....................1场..............?
....................0场.............?