How much does the house edge really take?
Watched · 48 of 75 seconds
This bar is read-only. You cannot drag it or skip ahead, and tapping it does nothing.
What this lesson covers
When you see odds of 2.10 and 1.75 on the same match, the two implied probabilities do not add up to 100%, they add up to 104.8%. The 4.8 percentage-point overround and the separate normalised theoretical edge of about 4.5% are not rounding errors. The edge models a negative average return across repeated equivalent bets; it is not a fee withheld from every individual slip. The video shows how normalising the displayed market reveals its built-in margin; that estimate is not the true underlying chance or a forecast.
Unlocking the quiz
The button below unlocks once you have actually watched 90% or more of the video. You are at 64%.
Take the quiz (20 seconds to go)Switch to another tab and the timer stops. Time spent elsewhere does not count.
What this lesson pays
+10 tokens, fixed, and published in the library before you open it. There are no reward boxes, no multipliers and no draws. Watching it again earns nothing extra.
Tokens have no cash value. They cannot be bought, sold or exchanged for money.