If the prob. of winning a round is, 3/5

             and you have, 30, dollars, and the exit capital is, 60

                     and you need to get it in, 20, rounds

           Then your probability of finishing alive is, 0.8103315171

      Let's play this game, 10000,  times. The fraction that finished alive is

                                  0.8078000000

                          This took, 2.649, seconds .