Permutation formula | Probability and combinatorics | Probability and Statistics | Khan Academy

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[dylannolan]

The way he works backwards towards the formula is why he is the best math teacher.

[shapi]

I need this kind of teacher in class. I usually understand my own math teacher and even get 95 straight grades for the first 3 quarters but then I just don't seem to understand him when probability lesson came. I love math so much that it's such a big deal for me if I don't understand it

[ceyceydaaa]

Hi, I'm writing from Turkey. Since I discovered Khan Academy, I listen your lessons at least 1 hour a day. There was one main reason at first: to develop my English level and learn some terms. But then I realized that you are telling the reasons of formulas. That's why I wanna thank you. You deserve more followers, everyone MUST know these teacher cause they're awesome!

[owencave]

Just learned more from a 7 minute video than I would in an hour math class with my easily distracted football coach-teacher and annoying loud kids who can’t shut up

[TheTestedTutor]

My tutoring role model, inspired me to start a channel.

[ionloghin]

I swear to god, if this was shown in schools on the projector, I honestly think being a math teacher will no longer be a job.

[laurenking]

You just took an 1hr 15m lecture and put it into 7.34 minutes. Thank you.

[JoeBlo]

I had such difficulty conceptualizing the equation but this video summed it up perfectly and with ease. Thanks again!

[ramonaraujo]

This guy is so good. Light bulb just turned on!!!

[zinebssakhi]

what I like most about Khan's Vids, is that we don't need to memories formulas because we understand them and we discover the logic behind ... Thank you so much

[craighennessy]

I have been trying to find a good explanation of the proof of the permutation formula and this is by far the best I have found.

[Gayazz]

Absolute king, makes it so much more easier to understand with the visualization instead of blindly following a formula

[lokeshgoyal]

You expained in the way i want, as i also don't like to remember the formulas, but to remember the logic behind it, so that i can generate my formula for my own situations, whenever i need it.
Great Thanks!

[tanmaychavan]

Nothing on youtube have explained as best as this. ❤❤❤

[WebDevAnjali]

this my first time watching your video and you're my maths crush now. I LOVE YOU.
I have been learning permutations for so so long n also solved many questions but by sort of memorising the formulas but your explaination made it easly n understandable like now i'd never need to memorise iy anymore. i can not ever forget it now. you made me love maths again. THANK U SO MUCH.

[rceby]

dude, my confusion is cleared for just a ahort period of time. THANK YOUUU!!

[boody_tube]

Man ur way of explaining, ur accent and ur voice is so amazing

[IRenataI]

Спасибо большое за объяснение, стало понятно!

[JMSobrevilla]

I looove u so so much. My math teacher is full of formulas and rarely rarely visualizes it. Oh well that's part of life

[hazeldsouza]

My Lord! I've finally understood this concept thanks to you Khan sir! Wish we had YT when we were students!