This is not my best video on this. I just remade it after I had enough people tell me to do so. Here is the link to a much longer version of this video with lots more examples and explanations!!!!!    • Difference between Permutation and Co...   I do have two videos that go into permutation and combination separately and I spend time explaining them with simpler examples. This video should really be watched after those two. Im not sure why this one is so popular. Here is the combination vid    • What is a combination   and here is the permutation video    • What is a permutation  . How to tell the difference between a permutation and a combination. Here are several examples that will help you understand the difference.