In two or more complete sentences, describe why the following question is a combination. in how many ways can five students in a class of 30 be chosen for a committee?

Of the five chosen for the committee the order in which they are chosen does not matter. A combination is defined as how many possible ways a group can be chosen. In this case students a,b,c,d,e is the same possibility as students e,d,c,b,a. 

6xy and -16xy000000000