Thread:Gob47/@comment-36558623-20181122013345/@comment-30739178-20181124165504

that's not how it works

it's if you want at least one pair of birthdays you do (1-(probability that no one has the same birthday))

sooooo

1-(364/365)(363/365)(362/365)....({365-n}/365) where n = number of people you have