Permutations P(n,r)
60
Number of Permutations
P(n,r) = n! / (n-r)!
Calculation Steps:
P(5,3) = 5! / (5-3)!
= 120 / 2
= 60
Common Examples:
Arranging 5 books on a shelf5! = 120
3-letter codes from A-Z26³ = 17,576
Top 3 from 10 contestantsP(10,3) = 720