Q6: Acertaincompanyassignsemployeestooffices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3 employeesto 2 different offices?
A. 5 B. 6 C. 7 D. 8 E. 9 Answer: D 看不懂 請牛牛們翻譯整個題目 感謝不盡了
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发表于 2011-6-8 13:29:11
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