The random possibilites

block_random.py

import random

foo = random.SystemRandom()

threshold = 8
at_least = 5

bingo = 0
experiment_times = 100000

for i in range(experiment_times):

  # build 100 numbers into a list, each number range from 0 to 101
  templist = []
  for i in range(100):
    templist.append(foo.randint(0,101))

  # smaller than threshold
  smaller_than_threshold = []
  for item in templist:
    if item < threshold:
      smaller_than_threshold.append(item)

  if len(smaller_than_threshold) >= at_least:
    bingo += 1

print(bingo/experiment_times)