Greetings:
The probability that out of 13 people in a room, 2 will be born in the same
month is 13/24.
There are 78 ways of selecting groups of two out of a total of 13. The
probability that any 2 people in any selected group share the same month of
birth is 1/12 x 1/12 or 1/144. Therefore
the probability that 2 people out of 13 will share the same birth month is 78
x 1/144 or 13/24.
Peace!
Amat
----------------------------------------------------------------------------
To unsubscribe/subscribe or view archives of postings, go to the Gambia-L
Web interface at: http://maelstrom.stjohns.edu/archives/gambia-l.html
----------------------------------------------------------------------------