Problema Solution
Meghan bought 8 different colored folders for school. Suppose she has six classes. How many different ways can she select a folder for each class ?
Answer provided by our tutors
Number of all permutations all n distinct things taken r at a time (1 ≤ r ≤ n) = n!/(n−r)!
In your case it's 8!/(8-6)!=8!/2!=8*6*7*5*4*3=20160.