Tue, 29 Jan 2008 04:52:00 -0800 from Dave
:

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

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.

http://www.tc3.edu/instruct/sbrown/stat/birthday.htm

gives the formula and explains where it comes from. It makes the same
simplifying assumption that you do, ignoring leap years.

--
Stan Brown, Oak Road Systems, Tompkins County, New York, USA
http://OakRoadSystems.com/
"If there's one thing I know, it's men. I ought to: it's
been my life work." -- Marie Dressler, in /Dinner at Eight/