How to Solve ANY Permutation Problem in Seconds | Combinatorics Ep. 3

What’s up cool person! Here are the practice problems you can use to check your knowledge on Permutations from this video! Practice Problems: 1. Solve P (6,3) 2. Solve P (9, 2) 3. Solve P (4, 4) Challenge Problem: There are 5 different colors of paint, and you need 2 colors for your fence, 1 for the ceiling and 1 for the wall. How many different ways can you select the colors? Answer key: 1. Solve P (6,3) = 6!/(6-3)!= 6!/3! = 120 2. Solve P (9, 2) = 9!(9-2)!= 9!/7! = 72 3. Solve P (4, 4) = 4!(4-4)!= 4!/0! = 24 CP: n = 5, r = 2 P (5,2) = 5!(5-2)!= 20