If I put nine pieces of paper, with a digit from 19 written on each one, into a hat, and pull 3 out without replacement, what is the likelihood that I will select three numbers that result in a winning tictactoe?
1  2  3
++
4  5  6
++
7  8  9
There are only 8 ways of winning, and there are 9x8x7/3x2x1=84 ways of picking three numbers, so the odds are 8 in 84, about 10%.

Posted by Oskar
on 20040730 13:01:15 