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 7 employees to 2 different offices?  Choose the correct option.
A) 215  B) 310  C) 343  D) 243  E) 123
Each of three employee can be assigned to either of offices, meaning that each has 2 choices --&gt; 7*7*7=7^3=343.   Answer: 343.
<result>C</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 7 employees to 2 different offices?