Introduction to Combinations (Unordered Selections)

[@digdox]

Very good lesson! I'm from Brazil and I was struggling to understand the reason why the combination formula works, but thanks to you I finally managed to get the whole thing. You're an awesome professor, Eddie! I really appreciate your videos.

[@ZackSussmanMusic]

thank you so much for putting all your videos up! I used to watch them for fun but right now they are saving my life in math class as well!

[@orly6800]

wow the energy you put into this lecture made me learn actively lol

[@denisesheehan9189]

Thank you so much for sharing your lessons. My son is starting Y11 this year. He says your lessons are much clearer than mine!

[@josiahgibbs4063]

ha, all of his lessons are clearer then my actual teachers teaching me. :)

[@TURTWIG094]

This man really just pulled out his wallet to get a coin just to show the class what a legend you know hes passionate

[@LOLxUnique]

1 year of trying to understand this concept. I'm so happy its finally clicked, even if it is one day before the hsc exam :D Thank you!

[@giornogiovanna9475]

idk that are you even goin to see my comment but i wanted to know that how was your exam

[@LOLxUnique]

@@giornogiovanna9475 haha it was good! I got band 6 for maths and e4 for extension 1 maths. I graduated uni and now work as a software engineer 😄

[@giornogiovanna9475]

@@LOLxUnique wow man and also good luck for your rest of the life

[@shreyaschatterjee123]

@@LOLxUnique holy w

[@unnamedchannelowouwu]

I can't believe how understandable your classes are, I wish all teachers were like you, the way you explain concepts, and the feeling you share is simply amazing

[@siddharth5876]

THE BEST MATH TEACHER EVER

[@reiloh9749]

This guy is the GOAT

[@samkhadka-f3n]

thank you very much for your fantastic and wonderful explanation of permutations and combinations

[@studyplusmathematics562]

Thank u sir respect from a fellow teachers from India

[@mistec34]

Awesome as always, Sir!

[@joannabuttigieg1203]

Thank you Mr Woo!!!

[@shiranthiherath6043]

Very clear sir😊

[@rafiashemonti4099]

I noticed that 10C2 is equal to 10C8, or alternative k from n in a combination is equal. Please explain why this is. Thank you, sir. Btw your videos are so helpful and fun to watch, I used to watch them in my leisure but now they’re my lifesaver.

[@InshaDurwesh]

I found this in my textbook, hopefully it helps Corollary: Let n and r be nonnegative integers with r ≤n Then C(n, r) = C(n, n − r)

[@alexcheng4958]

Imagine you have 10 people and are choosing 2 of them to go outside. Another way to think of the problem is to imagine you have 10 people and you choose 8 of them to NOT go outside. It's counting the exact same thing, just from the other perspective. I hope this makes sense!

[@rafiashemonti4099]

@@alexcheng4958 it does thank you so much

[@efrdefrd10]

better than uni educaiton

[@globalteacher_amai]

yah! =)) you're OCD. I appreciate your sense of humor, Mr. Woo ^^

[@aks_aman.]

If i have 5 spots to fill using 4 numbers (non repeatable) then how do i solve 4p5

[@aneeqa5130]

it's 5p4

[@theunique140]

@@aneeqa5130 why❓

[@ssga7081]

It's like youre wanting to fill 5 boxes with 1 ball each..while having just FOUR balls! It's not possible!

[@echobreak]

@@theunique140 oooooooooof

[@deepaknicedramapleasesenda775]

Please capital send the video

[@echobreak]

no one cares mate

[@TheEthikos]

Disagree...I think it does matter if head comes first versus second...

[@fogcy]

nah but with regard to probability, you don't care if heads come first or heads come second. The base is that it's a 50% chance. You don't say that "if I flip a coin and get tails, there must be a 100% of getting tails." This is purely incorrect so order doesn't matter here.

[@TheEthikos]

@@fogcy I wasn't referring to a coin flip. 😁

[@ilikedoingstuff4633]

@@TheEthikos ...

[@harryyuan8304]

go fys

[@spncr7157]

fam shut up

[@user-me8fm5yf4n]

tf