2 ms·
You need 253 people in the room to have > 50% probability that one will have the same birthday as you. 1 - ((365 - 1)/365)^253 = 0.5005
by SamBam 7y ago
You need 253 people in the room to have > 50% probability that one will have the same birthday as you.
1 - ((365 - 1)/365)^253 = 0.5005
- uncoder0 7y agoIf birthdays are assumed to be distributed symmetrically. If you were born in august you'd need ~12 fewer people and for April you'd need ~12 more.[1] Not sure how that looks for the worlds population probably averages out pretty well regardless. [1]: https://www.panix.com/~murphy/bday.html https://www.panix.com/~murphy/bday.html