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 4 employees to 2 different offices?
Select.
A) 10  B) 15  C) 14  D) 16  E) 18
Each of three employee can be assigned to either of offices, meaning that each has 2 choices --&gt; 2*2*2*2=2^4=16.   Answer: 16.
<result>D</result>
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 4 employees to 2 different offices?