I was on a house warming party this weekend and becaus most people I know are geeks some math questions popped up. I usally do pretty well on those but it was this one question I had a hard time to understand why the answear was what it was.
How many people does it need to be at a party for the chance for 2 people to have the same birthday to be 50%.?
The correct answear acording to the person asking the question is 22. Somehow I have a mental block on this. Anyone out there know why? I might not ask the question exactly as intended.