Assuming that the Cubs are just as good as the teams they play, here are the odds of going to the world series.
Winning the single game playoff - 50 percent.
Winning the single game playoff and winning the first playoff series - 25 percent.
Winning the single game playoff and winning the two playoff series - 12.5 percent.
In other words, assuming that the Cubs are as good as the others, the odds are 7 to 1 that they will not play in the world series this year.
The odds of their winning the world series are 15 to 1 against them.