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题目内容
The numbers 5, 8, 9, 9 and 9 are written on five different cards, as shown. If two of the cards are to be selected randomly, without replacement, what is the probability that the sum of the numbers on the two cards will be a multiple of 3? Give your answer as a fraction.
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· 相关考点
6.4.4 条件概率 6.4.1 古典概率 1.8.5 能被特殊数字整除数字的规律
6.4.4 条件概率
6.4.1 古典概率
以上解析由 考满分老师提供。