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Originally Posted by jman5581
Let's assume the rules of this experiment were 5 straight rather than 10 straight. How often would a person have to win assuming a 75% profit can be shown on average for a 5 race parlay? Over half the time?
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Say you either lose 1 or win 0.75.
If X=% of time you need to win to break even, then
0.75 * X + (-1) * (1-X) = 0. because 1-X is the percent of time that you will lose.
.75X + (X-1) = 0
1.75X = 1
X = 57%.
That's how often you'd have to win to break even under your assumptions for 5-in-a-row.
--Dunbar