小题1:解:(1)树状图为:
共有12种可能结果.············································································· 3分 小题2:(2)游戏公平. ··································································· 4分 ∵ 两张牌的数字都是偶数有6种结果: (6,10),(6,12),(10,6),(10,12),(12,6),(12,10). ∴ 桐桐获胜的概率P==. ······························································ 5分 大诚获胜的概率也为.······································································ 6分 ∴ 游戏公平. |