Run experiments hundreds or thousands of times and watch probability come alive. See the Law of Large Numbers converge in real time.
Coin Flipper
H
T
50%
Heads
0
Tails
0
Total
0
Heads %
0.0%
Flip coins to see convergence
Heads vs Tails
Convergence to Expected
Dice Roller
Rolls
0
Most Common
-
Average
-
Roll dice to see convergence
Distribution
Expected vs Actual
Card Drawer
With replacement
Drawn
0
Hearts
0
Remaining
52
Suit Distribution
Rank Distribution
The Monty Hall Problem
The Paradox: You pick a door. The host, who knows what is behind each door, opens another door to reveal a goat.
Should you switch to the remaining door or stay? Counterintuitively, switching wins ~66.7% of the time!
Click a door to choose it.
1
Door 1
2
Door 2
3
Door 3
Switch Wins
0
Switch Total
0
Switch %
0%
Stay Wins
0
Stay Total
0
Stay %
0%
Switch vs Stay
Win Rate Over Trials
Birthday Paradox
Surprised? In a room of just 23 people, there is a greater than 50% chance that two of them share a birthday.
With 70 people, the probability exceeds 99.9%!