rom matplotlib import pyplot as plt
from math import factorial

p = .2  # add your code here: what is the probability of drawing up a contract?
n = 30  # add your code here: how many companies will we negotiate with?

distr = []  # add your code here: create a variable for the distribution value

for k in range(0, n+1):
    c = factorial(n)/(factorial(k) * factorial(n-k))
    prob = c * p**k * (1-p)**(n-k)
    distr.append(prob)
plt.bar(
    range(0, n+1),
    distr
)