Trapped up a work today with a big box of Krispy Kreme doughnuts for the office because it’s my birthday.
Met our project manager at the door who was also carrying a bag full of cakes because, as it turns out, it’s also his birthday. Our office has 16 people in it.
In two of my previous workplaces of similar size I’ve also shared a birthday with other members of staff
Turns out that to achieve a 50 % probability of two people in a randomly selected group sharing a birthday then you only need 23 people. A 99.9% probability is achieved at 70 people.
https://en.wikipedia.org/wiki/Birthday_problem
Maths is weird.
So, who else’s birthday is it today then?