European Wheel · 37 Pockets · 18 Red / 18 Black / 1 Green

The Law of Small Numbers
vs. the Law of Large Numbers

Spin the same wheel two ways at once: a short session of 100 spins, and a marathon of 100,000. Watch how wildly the short run can wander from true odds — and how the long run always finds its way back to 48.65% red.

Session One Law of Small Numbers

spins

– last spin: –

–

Red

–

Black

–

Green

Current red streak–

Longest red streak–

Running % red vs. true odds (48.65%)

Red streak lengths: observed vs. expected

Gambler's fallacy check: % red next, by streak just seen

Run a simulation to test whether a streak predicts the next spin.

Press "Spin Both Wheels" to begin.

Session Two Law of Large Numbers