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In a gift box, there are three types of gifts: 4 yoyo balls of different designs, 4 toys of different colors, and 3 candy bars of different flavors. In how many ways can 3 gifts be selected such that each one is out of each type of gift?
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· 相关考点
6.3.1 基本计数原理与加法原理
6.3.1 基本计数原理与加法原理
以上解析由 考满分老师提供。
