Question 830172
When the odds against are m:n, then the probability of winning is {{{n/(m+n)}}}. In this case, m = 8, n = 3.


{{{n/(m+n) = 3/(8+3) = 3/11}}}


So the answer is {{{3/11}}}


See the link below:


<a href="http://www.mathwords.com/o/odds_against.htm">http://www.mathwords.com/o/odds_against.htm</a>