Plinko Probability

Discover the normal distribution through random processes

At each peg, a ball has equal probability of going left or right. After n rows, the number of right-bounces follows a binomial distribution. With many rows and equal probability, the distribution approximates a normal (Gaussian) curve — the Central Limit Theorem in action. Standard deviation σ = √(np(1-p)) measures spread. This underlies all statistical inference, from polls to quantum measurements.