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The number of different subsets of 4 elements that can be selected from a set of 6 elements is 15. How many more different subsets of 4 elements can be selected from a set of 8 elements than from a set of 6 elements?
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· 相关考点
6.1.1 子集
6.1.1 子集
以上解析由 考满分老师提供。
