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Four guests A, B, C and D have to be assigned into three different double rooms (at least one guest has to be assigned to each room) such that A and B won't have to stay in the double room at the same time. How many ways in total can they be assigned into these rooms?
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· 相关考点
6.3.8 其他特殊排列组合技巧
6.3.8 其他特殊排列组合技巧
以上解析由 考满分老师提供。
