Hi,

I can work out the probabilities for 2 people in the same room sharing a
birthday by dragging formula down like so

No People Different Same %
2 364 365 99.73% 0.274%
3 363 365 99.18% 0.820%
4 362 365 98.36% 1.636%


But can anyone get this equation into a single formula where I imput n for
the number of people in the room and the probability is calculated.

And secodly a formula for the probability as the same birthday as me

Dave