A certain company assigns employees to offices 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 employees to 2 different offices?
5
6
7
8
9
要是计算答案是2的3次方,答案为8。但是我理解 3 employees 是没区分的啊!所以情况小于八种。请老师解答。