the.com/law of large numbers

means A mathematical principle stating that as you repeat a random process more and more times, the average of the results gets closer and closer to the expected (true) value.

from The term comes from French mathématicien Siméon Denis Poisson, who introduced 'la loi des grands nombres' in the early 1800s, building on groundwork laid by Jacob Bernoulli, whose 'Ars Conjectandi' (published 1713, after his death) first proved the core result — that enough trials will tame even the wildest-looking randomness into a stable average.