21 Mar
2008
21 Mar
'08
1:15 p.m.
Tony Duell wrote:
Not so. If there are at least 367 PDP enthusiasts then at least 2 have a
common birthday. But I didn't say that _only_ 2 share a brithday, or that
there are n 3 that share a birthday. It's possible of course, for all 367
to have the same birthday, or for there to be a common birthday in a
smaller set of people.
So my original statement stands. Give a set of 367 people (in this case
PDP enthusiasts), it's certain that 2 of them will share a birthday.
-tony
Assuming there are at least 367 PDP enthusiasts
in the world, then the
pigeonhole princiiple proves that at least 2 will share a birthday.
Only if there's a rule requiring 366 such enthusiasts to have their
birthdays on different days :-)