write P if permutations C if combinations.
1. determining top five winners from a contest.
2. there are 50 applicants for 4 computer programmer positions.
3. picking 8 balls from a basket of 20 balls.
4. opening a cellphone password.
5. five people posing for pictures.
6. choosing 2 movies to watch before dinner.
7. choosing 3 of your friends to join the game.
8. forming a committee of 4 from 20 people.
9. assigning seats to guest at a party.
10. entering the PIN of your ATM card.
11. 6 out of 15 students will ride in a bus.
12. the student body of 10 students want to elect a president, vice president, secretary, and treasurer.
13. there are 110 people at a meeting. they each shake hands with everyone else.
14. assembling a jigsaw puzzle.
15. a group of 25 people are going to run a race and top 8 finishers advance to the finals.

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