sem_5 / 6

def factorial(n):
    f = 1
    for i in range(2, n + 1):
        f = f * i
    return f

def binom_prob(p, n ,k):
    return (factorial(n) // (factorial(k) * factorial(n - k))) * (p ** k) * ((1 - p) ** (n - k))

binom_prob(0.5,5,5)