Quincunx (Galton Board)
The quincunx (or Galton Board) is an amazing machine.
Pegs and balls and probability!
Have a play, then read Quincunx Explained.
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Things to Notice:
- At "50% / 50%" a ball has an equal chance of bouncing left or right
- Watch the pile grow. Why does it form a central peak instead of spreading out evenly?
- How rare is it for a ball to go all the way to the far left or far right?
The quincunx is also called a binostat, a bean machine, or a Galton Board after Sir Francis Galton a man of many wide ranging interests.