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A box at a yard sale contains 3 different china dinner sets, each consisting of 5 plates. A customer will randomly select 2 plates to check for defects. What is the probability that the 2 plates selected will be from the same dinner set?
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· 相关考点
6.4.1 古典概率
6.4.1 古典概率
以上解析由 考满分老师提供。