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The Birthday Paradox

How many people need to be in a room before there’s a 50% chance that two of them share the same birthday? Is it about 180, since that’s around half of 365? Is it only 100? The real answer is surprisingly much, much smaller. If you have just 23 people in a room, the odds of whether two get presents on the same day is a coin flip. Get 50 people together and that shared-birthday probability skyrockets to 97%. A handful more and it’s a virtual statistical certainty. Really? Yes, really! With the aid of tiny plastic babies and some mathematics, Kevin proves and visualizes this surprising veridical paradox. *** LINKS *** Birthday Attack Example In Hacking    • 359 Example of a Birthday Attack   Birthday Attack Hash Collision    • Video   Hashing Algorithms And Security - Computerphile    • Hashing Algorithms and Security - Com...   Discussion On The Birthday Attack    • Discussion on The Birthday Attack   The Birthday Attack https://danielmiessler.com/study/birt... *********** Vsauce2 Links Twitter:   / vsaucetwo   Facebook:   / vsaucetwo   Hosted, Produced, And Edited by Kevin Lieber Instagram:   / kevlieber   Twitter:   / kevinlieber   Website: http://kevinlieber.com Research And Writing by Matthew Tabor   / matthewktabor   Huge Thanks To Paula Lieber https://www.etsy.com/shop/Craftality Get Vsauce's favorite science and math toys delivered to your door! https://www.curiositybox.com/ Select Music By Jake Chudnow:    / jakechudnow   MY PODCAST -- THE CREATE UNKNOWN    / thecreateunknown