Counting Principle-Permutations-Combinations

This video covering the counting principle, permutations, and combinations is long. As a result, I created this guide to help you skip to the parts that will help you. Enjoy
Guide
0:25 Warm-up covering factorials
1:31 Evaluate combinations and permutations using a calculator
5:16 Solving fundamental counting principle
7:43 Word problem using counting principles
8:30 Counting principle word problem involving events and positions
10:00 Counting principle problem involving phone numbers
12:32 Word problem using counting principles.
14:31 Permutations
15:45 Problems using permutations
18:17 Problem solving with a permutation
22:10 Distinguishable permutations
25:53 Combinations
29:30 Word problem using combinations
31:00 Which should you use, combination or permutation?