There are possible outcomes of the draw.Originally Posted by skhan
Of these exactly matches all six of your numbers.
Also there are exactly 24 which match all but you smallest number (that
is the miss-matched number can be any of the numbers other than the
five matched or the unmatched number)
The same goes for the cases where it is the next smallest that is mis-matched, and the next ..
So there are winning outcomes.
Therefore the probability of winning is the ratio of the number of
winning outcomes to the number of all outcomes, so: