MediumProbabilitypr-371

Discrete Expectation Value

Problem

The expectation of a discrete variable is sum_i x_i p_i.

Given the values and their probabilities (which sum to one), return E[X].

Hint

Weight each value by its probability.

case 1

in: [[0,1],[0.5,0.5]]

expected: 0.5

case 2

in: [[1,2,3],[0.2,0.5,0.3]]

expected: 2.1

case 3

in: [[-1,0,1],[0.25,0.5,0.25]]

expected: 0

Starter codePython

def discrete_expectation_value(values, probs):
    # Your code here
    pass

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