Permutations (counting principle, factorials)

A video lesson on Permutations, calculating them using the counting principle and the nPr formula.

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[HannahBirgeGarcia]

wow! after struggling for almost an hour to figure out what in the world my textbook was talking about I just watched this one video and I got it!!!! Thanks so much!!

[tao-minglau]

I've been searching through a gazillion permutations videos and this is the ONLY one that makes sense. Ties is all together. Indebted to you!

[jakeprusinski]

Thank you so much for making this video! I was just assigned this homework and needed help. Found a couple of vidz that assisted me a little, but not like this one. This made it so easy to understand and really get a feel for why you would even use this kind of stuff. Well, continue with the great vidz, you helped me so much!

[chelseacolon]

This video is amazing - very well done! The examples you choose caught my interest, and I really enjoyed how you were able to take the a scenario and make different problems out of it. And you explained everything so well! Unlike most permutation videos I have seen, this one did not bore me. Great job, and I look forward to seeing more videos from you :)

[chijenyogininp]

Yay! Your videos don't suck!  You don't sound pretentious (like most Kahn Academy male voices)!   Thanks for putting a video out that people can relate to!   

[DAVIDSTEPHENS]

A truly good explanation of the concept of a permutation.One's understanding is increased dramatically when the concept is applied to a "real" situation.

[casandrawade]

Really, you did me a HUGE favor by breaking it down like that. Are you going to do any more videos?

[LisaBrock]

Now it makes sense, thank you for making this simpler and very interesting to learn. 

[RevolutionDude]

Please come teach at my school and at every school ever. You are awesome and I love you. Keep doing these videos!

[christinewolfman]

This is a great introduction for my class. Thank you!!

[MrPrasanthjohn]

Very helpful and the examples are very apt. Thanks for all your head work. It was very difficult for me to understand while I was doing my graduation. So I skipped probability chapter and learned all other chapters in my business statistics. I wish if I would have seen this video during my graduation time.

[chintanshah]

Brilliant explanation for highlighting difference between counting and permutation applications.

[youcefbeghdadi]

Amazing video. Beautiful visuals. Thanks a lot for the hard work.
The way you explained it is amazing!

[frozen_tortus]

Thanks, I just made brute force password algorithm with your formula, not only that I was able to customize it for my language since I understood the formula. Thanks for the cheese!

[avinashrai]

Very Nice and Explaining way is awesome, , ,

[muchacamara]

fantastic and fun videos. keep up the excellent work!!

[val]

Great explanations! I learned a lot :)

[noredbull]

Second lock has less combinations, because you can not use the same number twice in a row. It has to be different equation.

[MrSHiNRILLA]

Mate, that was a fantastic job. Keep these videos coming. Peace.

[PokeRapper]

Very well explained and illustrated. Keep doing these videos. :)