Question

11.3.29 An election ballot asks voters to select four city commissioners from a group of eight candidates. In how many ways can this be​ done?

Answer 1

Any 4 from 8 is a permutation, solved by the use of factorials:

8!/((8-4)! x 4!) which simplifies to (8 x 7 x 6 x 5)/(4 x 3 x 2)
70 different ways.