Binomial Moments Mean Variance

Problem

A binomial(n, p) distribution has mean n p and variance n p (1 - p).

Given n and p, return [mean, variance].

Hint

Both moments are linear in n.

case 1

in: [10,0.5]

expected: [5,2.5]

case 2

in: [100,0.01]

expected: [1,0.99]

case 3

in: [5,1]

expected: [5,0]

Starter codePython

def binomial_mean_and_variance(n, p):
    # Your code here
    pass

3 test cases · run your code against them in the editor