3.甲乙两同学参加数学竞赛共10道题6道填空题4道选择题两人互不影响各抽一道则甲抽到选择题的概率和乙抽不到选择题的概率分别为 Template




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tomski3.甲乙两同学参加数学竞赛共10道题6道填空题4道选择题两人互不影响各抽一道则甲抽到选择题的概率和乙抽不到选择题的概率分别为 coloring