The Birthday Paradox

  • күнү жарыяланды 2 жыл мурун

    Vsauce2

    узактыгы: 08:02

    Watch my newest video, "Could a Toothpaste Sandwich Brush Your Teeth?": kgcold.info/u/video/spaambnNeoykh4o
    **** LINKS ****
    Birthday Attack Example In Hacking
    kgcold.info/u/video/l6WdqLvei2yClZw
    Birthday Attack Hash Collision
    kgcold.info/u/video/lGqemMTLZn2kiKg
    Hashing Algorithms And Security - Computerphile
    kgcold.info/u/video/xWaXaM3Zeo5neJg
    Discussion On The Birthday Attack
    kgcold.info/u/video/lZR6fJXUoHB3bWE
    The Birthday Attack
    danielmiessler.com/study/birthday_attack/
    ***********
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Vsauce2
Vsauce2

Hey I just recently passed 4 million subscribers and just wanted to thank each and every one of you!!! Now if you'll excuse me I have a cup of babies to finish drinking.

2 жыл мурун
veverica c
veverica c

lol people think the answer is (364/365)^((n^2+n)/2) but it is 364!/((365-n)!*365^n-1) where n= number of babies

28 күн мурун
C
C

2:14 the Democrats

Ай мурун
Larry Wiggs II
Larry Wiggs II

What are the odds of finding the same set of three digits numbers? I have this quirk about me where I find the numbers 109 all over the world. In Madrid, I posted my 1090th photo to Instagram and within minutes I spotted a car with the license plate that read 1090. I randomly woke up at 1:09am when I checked my watch one night while I was in Medellin, Colombia. In Ethiopia, I took a picture of a door located on the second floor with the number 109 written on it. When I was in Japan, I learned that 109 (Tokyu) is an approximation of the word Tokyo, which is the reason 109 very popular in Japan. In Korea, 109 or October 9 is a national holiday on which the Korean language is celebrated. Oh, and 109 (October 9) is my birthday.

Ай мурун
Mohamed Mahmoud
Mohamed Mahmoud

Último online que

Ай мурун
MeMnOn1000bc ShEpHeRdKiNgS
MeMnOn1000bc ShEpHeRdKiNgS

Congratulations, I guess the number has risen over last 2 years.

Ай мурун
DanteCrack250
DanteCrack250

wisdom = viisaus wise = viisas

Саат мурун
Krishan goyal
Krishan goyal

I know you are looking for 19th May...!! And Bravo...your search has been completed...and you found me..!! Happy Birthday Buddy..!!

6 саат мурун
Lucie Dvorská
Lucie Dvorská

creepy

14 саат мурун
Bayjaj
Bayjaj

Imma be honest this still sounds wrong

Күн мурун
sachin patel
sachin patel

That theory uses hackers Target Birthday attack on database

Күн мурун
aryan bhat
aryan bhat

i wanted to be a programmmer,dropped the dream after watching this...

Күн мурун
Hussein Jafarinia
Hussein Jafarinia

Really nice

Күн мурун
Nishant Chauhan
Nishant Chauhan

Happy birthday to me

2 күн мурун
Seventh Hokage
Seventh Hokage

Let's see how many babies share same b'day Apr 20 here🙌🏻

2 күн мурун
npfariseni maphiri
npfariseni maphiri

I feel sorry for those babies 😭😭😭😭💔😂😂😂😂

3 күн мурун
Lucas Alves
Lucas Alves

I have never met someone in real life that was born the same day as me😒, at least where birthdays were known like school, work, famile, etc

4 күн мурун
zetastorm animations
zetastorm animations

What if humans have super specific mating seasons but like none of us ever notice

5 күн мурун
tripleduoddw
tripleduoddw

so if I kidnap 1,000 babies I break the rules of the universe by creating somthing of above %100 chance

5 күн мурун
Fix a Fix
Fix a Fix

Can Someone exain to me why the formula at 3:15 is like this? Why is the 364! Divided by another facorial of 342 and not just the 365? Where did he even get the number?

5 күн мурун
Fix a Fix
Fix a Fix

Omg I just figured it out on my own I never felt so smart before

5 күн мурун
Chucksto
Chucksto

Who needs to study for my AP statistics final exam when I can recognize the number 99.97 in a video about babies.

5 күн мурун
jc008 [Glitches and Bugs]
jc008 [Glitches and Bugs]

in a class of 26 classmates, 3 of them have the same birthday SOMEHOW! it's somewhere on february

6 күн мурун
Defaultz
Defaultz

The real question is, where you found all those babies???

6 күн мурун
Maliki West
Maliki West

April 16 who else??!

6 күн мурун
James Lorman
James Lorman

The wife and I have 7 children.....2 of them share the same birthday.... They are EXACTLY 3 years apart.

7 күн мурун
JAZZZ
JAZZZ

5:06 i am from germany and i was wondering whats the problem?

7 күн мурун
Sevara Sadikova
Sevara Sadikova

Reply to this comment with your birthday and wait until someone else finds out they have the same birthday

7 күн мурун
Stanton Clark
Stanton Clark

Anyone else 26th of May?

7 күн мурун
bella
bella

wait what

7 күн мурун
Wesly Mejia Ramirez
Wesly Mejia Ramirez

Who's birthday is may 13

8 күн мурун
Ashish Kumar
Ashish Kumar

Why did you divide it with 342! ?

9 күн мурун
chance lawler
chance lawler

I was born Feb 4th , where my babies at

9 күн мурун
Emmett Jaakkola
Emmett Jaakkola

Born 5 months apart and i knew it right when the video hit 15 seconds in.

10 күн мурун
Gamerz Club
Gamerz Club

I just realised that the base logic behind this paradox, is something I discovered when I was 8

10 күн мурун
Gamerz Club
Gamerz Club

I swear my life

10 күн мурун
MagnificentBastard
MagnificentBastard

what.

11 күн мурун
T. WIK
T. WIK

Anybody bday on July 30th?

11 күн мурун
Zinny
Zinny

May 30 /2004 / freind/december 14 \2002/ curiousity anyone out their

12 күн мурун
Ryan0911
Ryan0911

With spelling like that i’m amazed you’re not 2012

7 күн мурун
Molly Wilson
Molly Wilson

I didn't understand any of this but... Cool anyways 😅👍

13 күн мурун
James
James

Crazy paradox, I bet all of us were born on the same planet 😲😲

13 күн мурун
killerghost
killerghost

Wow YouTube recommend it literally on my birthday idk may be yt server has a AI which is now self aware . May be terminater 7 : weird recommendations 😅

14 күн мурун
baraa halak
baraa halak

Why can't we calculate the probability of them sharing the same birthday? Like baby 1 has bd date x Baby 2 probability of having that bd date is 1/365 and baby 3 probability is 2/365 and so on? Please explain it's killing me

14 күн мурун
Jacob Morel
Jacob Morel

Planned parenthood hood be like 2:06

15 күн мурун
Sean Macguire
Sean Macguire

Can 22 people reply to this comment, stating your birthday please? Mine’s May 8th. Let’s see if anyone matches their birthdays lol

15 күн мурун
OssoGotDaMovement
OssoGotDaMovement

But everyone in my classroom had different birthdays 😂😂

15 күн мурун
Mr. Strange
Mr. Strange

Anyone here for 23rd october 2000?

15 күн мурун
Pastel Moon
Pastel Moon

So I realized he’s left handed

16 күн мурун
michael33145
michael33145

I have never met someone with the same birthday as me... Including all the way through primary school with 30 "babies" in each class

16 күн мурун
Sand
Sand

The chance isn't that one specific baby will share a birthday with another, it's that there's a pair in general. The amount of possible pairs in 23 babies is 253, while there are only 22 pairs that you are in

7 күн мурун
Tinashe Masoka
Tinashe Masoka

Any September 12

17 күн мурун
Emma Mayfield
Emma Mayfield

i know 3 people that have my birthday

18 күн мурун
Dutchbeer12
Dutchbeer12

Me and my sister are born on the same day but with 4 years in between I was 2 weeks to late and my sister 1 day early

18 күн мурун
79keen
79keen

My birthday is on 20th October. does anyone have the same birthday as me?

18 күн мурун
Y*L GAMER Yakob Loub
Y*L GAMER Yakob Loub

Its funny i have two sisters and i share birthdays with one of them

19 күн мурун
raquel lohmann
raquel lohmann

april 6th

19 күн мурун
NASEEHA SAHAR ANSARI
NASEEHA SAHAR ANSARI

I just wanna know who else has the same birthday as me. 10th March babies hit me up!😗

19 күн мурун
Ayush Yadav
Ayush Yadav

What if I have only 2

19 күн мурун
Tuhfa M.
Tuhfa M.

I was born April 10. I can guarantee no one else has my birthday.

19 күн мурун
Alfie Kane
Alfie Kane

September 12

20 күн мурун
MADONG
MADONG

*It would be a different case if it is not Birhday* I mean, if it is just picking random number out of 365. *If you pick 364 numbers out of 365 will have you 1 out of 365 of not picking the same number.* And not 99.9997% for just 100 Bithdays ! 🙄 Wtf

20 күн мурун
Dylan Christophel
Dylan Christophel

Oct 29, 2003

21 күн мурун
Tony Stark
Tony Stark

Me who's barley passing Physics: yeah sounds about right

21 күн мурун
Handsome Rat
Handsome Rat

I feel like probability is easier than physics

5 саат мурун
BilkMucket
BilkMucket

Aswell as english

2 күн мурун
Bill Foster's Beans
Bill Foster's Beans

What do grains have to do with physics

4 күн мурун
Moonlight io
Moonlight io

@Tony Stark you're*

5 күн мурун
howcuteprez
howcuteprez

@Boen yes

5 күн мурун
Cesar Larumbe
Cesar Larumbe

Who’s birthday is March 27? Lmao

22 күн мурун
Destroyercheeta
Destroyercheeta

march 26 close

18 күн мурун
Vladimir Pavliv
Vladimir Pavliv

why those have to be babies? adult people had birthdays as well.

22 күн мурун
Mitchell McHam
Mitchell McHam

May 5th

22 күн мурун
Daniel Moses
Daniel Moses

I discovered that my roommate and I had the same birthday and then we discovered that our dads had the same birthday as each other, too. What are the odds of that?

22 күн мурун
Take Care
Take Care

This got recommended on my bday

22 күн мурун
Mew2Knight
Mew2Knight

it'is not a paradox go f*c* yourself

23 күн мурун
Mew2Knight
Mew2Knight

@Sand Know you who I'm french!?

6 күн мурун
Sand
Sand

Pardon

7 күн мурун
REV STREAK
REV STREAK

7th of agust on 03'

23 күн мурун
Frank Helldal
Frank Helldal

Crossing my fingers this will come up on my upcoming text

23 күн мурун
Jazib Nibras Ahamed
Jazib Nibras Ahamed

That means that every other average classroom has 2 kids with the same birthday

23 күн мурун
Sand
Sand

Yep

7 күн мурун
Charles McElroy
Charles McElroy

Me watching this the night before my birthday 🥳

24 күн мурун
Andoryuu
Andoryuu

I wasn't born, I was hatched.

24 күн мурун
John Porter
John Porter

How would you alter this calculation to get the probability of X matching birthdays?

24 күн мурун
God's disciple
God's disciple

me and my brother in law share a birthday, so when we go anywhere together the odds are 100% always

25 күн мурун
Viola Mandy Finnigan
Viola Mandy Finnigan

I got recomended this video on my birthday... coincidence? 😂🙈

25 күн мурун
Adam Wigley
Adam Wigley

My bday is April 23rd also. Happy late birthday 🎂!!

24 күн мурун
Ryan Cornwell
Ryan Cornwell

The dababy paradox

25 күн мурун
mohawmmad mahdi
mohawmmad mahdi

12 march

25 күн мурун
Alexander Supertramp
Alexander Supertramp

Think about it. The odds of everyone being born on a different day out of a group of 365 people are way lower than two people sharing a birthday.

25 күн мурун
ruthlessluder
ruthlessluder

How do you calculate the probability of a group of people having the same exact birth date that includes the year?

25 күн мурун
Owen
Owen

Any June 2 out there? 🧐

26 күн мурун
Ronel Pader
Ronel Pader

*Vsauce4 when?*

26 күн мурун
dang urbano
dang urbano

are you son of micheal?

26 күн мурун
Juan José Calderon
Juan José Calderon

¿Someone else with birthday on 7 February?

26 күн мурун
Gavino Lucero
Gavino Lucero

YES!

5 күн мурун
Adelia Galuh Nurpramesti
Adelia Galuh Nurpramesti

23 babies issa NCT?!!!

27 күн мурун
Nicole Ng
Nicole Ng

But what are the chances of meeting someone with the same bday TWICE who have the same music taste as you

27 күн мурун
Permata Az
Permata Az

._. my brain is broken i see 23 and all i think about is nct T-T

27 күн мурун
Timar
Timar

I have 24 people in my class and one of my classmates birthday is the same as mine

28 күн мурун
Petr Vejchoda
Petr Vejchoda

What are the odds of meeting a guy, that has the same first name, share not only the birth date, but actually was born in the same day and was born in the same hospital doing the same sport as you?

28 күн мурун
Filipe Viana
Filipe Viana

Antoine Griezmann made it with 3 babies

28 күн мурун
Rohan Khatri
Rohan Khatri

I was born on 27th November. 😁

28 күн мурун
æsthxticʕ·ᴥ·ʔbear
æsthxticʕ·ᴥ·ʔbear

It's my birthday

28 күн мурун
Mana Shay
Mana Shay

My birthday is in one week🤔

29 күн мурун
Alex Smith
Alex Smith

Ay, any 11/30s out there?

29 күн мурун
J.
J.

I share a birthday with Harry Potter....does that count?

29 күн мурун
Nat Sirk
Nat Sirk

isnt it supposed to be addition and not multiplication?

29 күн мурун
Muhammad Raihan
Muhammad Raihan

I was born in February 30th

29 күн мурун
Trevor Hartman
Trevor Hartman

its almost 2 am bro calm down please

29 күн мурун
ALIM ZAMAN
ALIM ZAMAN

21st February Me... Anybody Here?

Ай мурун
Garrett
Garrett

I saw when this video was uploaded. It was on my birthday lol.

Ай мурун
TOLO009
TOLO009

4:32 253 is the exact sum of the possibilities of 23 babies. 22+21+20+19....=253, thats why the math works!

Ай мурун
Jesse R.
Jesse R.

Wait tell me if this makes sense? If you have 75 people and the odds of one pair of people share a birthday are 99.97, then I’d you multiple that group of people by 75, so now you have those individual groups of 75, but have 5,625 people, will everyone in that group of people combined have a birthday twin ~2,812.5 people share a birthday with another person in that group?

Ай мурун
Chanan Ram
Chanan Ram

Whose birthday comes on 19 March 🎂 Like and tell him

Ай мурун
WtfMinty
WtfMinty

I keep trying to put this into a calculator(for funsies. I just want to try multiple different numbers to determine their probabilities) and it comes out as infinity or error. Could someone tell me how to fix this? Thanks.

Ай мурун
TOLO009
TOLO009

27th july anyone?

Ай мурун
Hailey Hayes
Hailey Hayes

Today is my birthday

Ай мурун
nusheon
nusheon

i read babies as babes and was like da fuq

Ай мурун

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