Linearity of Expectation Sum

Problem

Expectation is linear: E[X1 + ... + Xn] = sum_i E[Xi] regardless of dependence.

Given the list of means, return the mean of the sum.

Hint

No independence assumption is needed.

case 1

in: [[1,2,3]]

expected: 6

case 2

in: [[0,0]]

expected: 0

case 3

in: [[-1,1]]

expected: 0

Starter codePython

def linearity_of_expectation_sum(means):
    # Your code here
    pass

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