10. if P9,r=3024 , what is r ? A.2 B. 4 C.5 D.6 11. In a lown fiesta singing compelilion with 12 contestants, in how many ways can the organizer arrange the first three singers? A.132 B.990 C.1320 D 1716 12 What is P8,5 A 56 B 336 C 1400 D 6720 13. If Pn. 4=5040 , then n=underline C.9 D. 8 A.12 B.10 14. Given x=Pn,n and y=Pn,n-1 , what can be concluded about x and y? A. x>y B. x
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