pres.py

from collections import defaultdict
import random

def left_or_right():
  return 'l' if random.randint(0, 9) == 0 else 'r'

def make_group():
  d = defaultdict(lambda: 0)
  for i in range(45):
    d[left_or_right()] += 1

  return d

def count_groups():
  more_than_14 = 0
  trials = 100000

  for i in range(1000):
    d = make_group()
    if d['l'] / sum(d.values()) > 0.14:
      more_than_14 += 1

  print(f"got more than 14% left-handed {(more_than_14 / trials) * 100}% of the time")

if __name__ == "__main__":
  count_groups()