1. C
2. C
3. C
4. A
5. D
6. A
7. A (probably wrong... i always get nCr and nPr around the wrong way)
8. D
9. C
10. B
11. B
12. A
13. D (probably wrong, just took a guess)
14. D ( same as above)
15. D
16. A
17. C
18. B
19. B
20. B (just guessed)
21. D
22. A