Fair Toss
Probability lab
Two sides, equally likely.
Heads chance
50% · fair
Last outcome
Nothing yet
Trial 0 of 100
Trials
0
Heads
—
Streak
—
Gap
—
model 50%
When a streak shows up, the next Heads is still 50%.
Speed
Steady
100 left · a few seconds
Gambler's fallacy
A run of the same result does not make the opposite result due. Coins and dice do not keep a debt. The bars can sit away from the dashed line for a while. That is a small sample, not something the next toss has to repay. Betting that a hot streak must continue is the same mistake the other way.
When a streak shows up, the next Heads is still 50%.
What this means
A fair coin is half heads, half tails. One flip proves nothing. Run a few hundred and the bars should meet the dashed line.
Tap a row to follow that outcome. The generator is pseudo-random — close enough to coins and dice for class.