Question

There are 11 students in your class. In how many ways a group of 4 students will be

selected to participate in a social campaign such that you will always be included in
the group to lead the event?

Answer 1

Answer: 10P3=720

Explanation:

Answer 2

Explanation:

If you are always included to lead, that leaves 10 students to choose from.

If all that is important is being selected, then there are 10C3 = 120 ways to choose them.

If each selection has a unique duty, then there are 10P3 = 720 ways to assign them their jobs.