The Galton board is a mechanical device made of wooden pegs and falling balls.
Whenever a ball falls through one set of pegs, it immediately encounters another that forces it to go left or right with 50/50 probability.
While it is impossible to guess which direction the ball will go anytime it encounters a peg, we can make an educated guess on where it will most likely end up since it will always follow a binomial distribution.
To be random and predictable simultaneously might feel like a paradox, but sometimes all it takes is for us to take a step back from the individual decisions and look at the resulting outcomes.
If the outcomes of our decision feel consistently surprising, maybe the solution is to drop a few more balls until a more evident pattern emerges.
Everyday life is both random and predictable. It just depends on where we choose to look.