پست from random import shuffle

from random import shuffle from collections import Counter def calc():     lst = [1, 1, 1, 2, 2, 2, 3, 3, 3]     shuffle(lst)     partitions = [lst[i : i + 3] for i in range(0, len(lst), 3)]     return all(len(set(sub)) == 3 for sub in partitions) n = 100_000 c = Counter(calc() for _ in range(n)) print(round(c[True] / n, 2)) @AmirSoroushh