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.
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.
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!
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
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.
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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.
wow the energy you put into this lecture made me learn actively lol
Thank you so much for sharing your lessons. My son is starting Y11 this year. He says your lessons are much clearer than mine!
ha, all of his lessons are clearer then my actual teachers teaching me. :)
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!
This man really just pulled out his wallet to get a coin just to show the class what a legend you know hes passionate
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!
idk that are you even goin to see my comment but i wanted to know that how was your exam
@@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 😄
@@LOLxUnique wow man and also good luck for your rest of the life
@@LOLxUnique holy w
thank you very much for your fantastic and wonderful explanation of permutations and combinations
Thank you Mr Woo!!!
better than uni educaiton
yah! =)) you're OCD. I appreciate your sense of humor, Mr. Woo ^^
This guy is the GOAT
Thank u sir respect from a fellow teachers from India
Awesome as always, Sir!
Moore Dorothy Lee Shirley Allen Donald
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.
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)
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!
@@alexcheng4958 it does thank you so much
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
THE BEST MATH TEACHER EVER
If i have 5 spots to fill using 4 numbers (non repeatable) then how do i solve 4p5
it's 5p4
@@aneeqa5130 why❓
It's like youre wanting to fill 5 boxes with 1 ball each..while having just FOUR balls! It's not possible!
@@theunique140 oooooooooof
Very clear sir😊
Please capital send the video
no one cares mate
Disagree...I think it does matter if head comes first versus second...
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.
@@fogcy I wasn't referring to a coin flip. 😁
@@TheEthikos ...
go fys
fam shut up
tf