There a 5 seniors on student council. two of them will be chosen to go to an all-district meeting. how many ways are there to choose the students who will go to the meeting?

decided if this is a permutation or a combination, and then find the number of ways to choose the students who go.

a. combination, number of ways = 20
b. permutation , number of ways = 20
c. permutation , number of ways = 10
d. combination , number of ways = 10