Question: 
Write a python function to find binomial co-efficient.


Model's Code:
def binomial_Coeff(n, k):
    if k > n:
        return 0
    if k == 0 or k == n:
        return 1
    k = min(k, n - k)
    res = 1
    for i in range(k):
        res = res * (n - i) // (i + 1)
    return res



Sample Correct Code:
def binomial_Coeff(n,k): 
    if k > n : 
       return 0
    if k==0 or k ==n : 
        return 1 
    return binomial_Coeff(n-1,k-1) + binomial_Coeff(n-1,k) 


Asserts:
assert binomial_Coeff(5,2) == 10
assert binomial_Coeff(4,3) == 4
assert binomial_Coeff(3,2) == 3


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 28 of 974: 22/28 (78.57142857142857%): success