Not how many, it's what order

[mogul397]

To narrow the problem of winning down.
More or less. We know WHAT will happen.
We just don't know what order.

A 50/50 prop usually works out close.

It's all a matter of the losing streaks based on what
order they come.

[Proofreaders2000]

Betting one even chance with a simple progression
would work.  The zero however will destroy a bankroll.