There are five employees willing to serve on one of two different committees. If each employee can only serve on one
the committee, how many possible ways are there for the openings on the committees to be filled?

I don't get this question. In my own view, each employee should have 2 option between the 2 committees. Therefore the answer would 2 to the power of 5 and 32 but the answer is 20 and I don't know WHY?? or could be the wrong answer?

help, please.