A senator asks his constituents to rank six issues in order of importance. How many rankings are possible?

Question

A senator asks his constituents to rank six issues in order of importance. How many rankings are possible? ​

Quizplus · Accepted Answer

The number of possible rankings can be found using factorials. In this case, there are 6 choices for the first ranking, 5 for the second, 4 for the third, and so on, until only one choice is left for the last ranking. Therefore, the number of possible rankings is 6 x 5 x 4 x 3 x 2 x 1 = 720, which is option D.

A Senator Asks His Constituents to Rank Six Issues in Order