Introduction to Permutations (Mathematics)

Hello there! For today's video, I talk about another topic that uses factorials: Permutations. If you haven't seen my other video on factorials, you can check it out here https://rumble.com/vtucz8-introduction-to-factorials.html

In a separate video, I talked about Permutations' counterpart: Combinations. If you haven't seen that video, you can watch it here https://rumble.com/vtfy4w-introduction-to-combinations-mathematics.html

Permutations differ from combinations in that the order does matter. For example, if you flip a coin twice and you get the results of heads then tails, this is different from getting tails then heads. Whereas in combinations, heads and tails vs tails and heads are the same thing because the order does not matter. I go over the formula for permutations and also a few practice problems so let's jump into the video!

Formula for Permutations: P(n,r) = nPr = n! / (n-r)!

Sections in this video:
0:00 Introduction to Permutations
1:21 Practice Problem #1
3:07 Using the Formula for Permutations
6:15 Practice Problem #2
11:29 Practice Problem #3

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