Conditional Probability from Joint

Problem

The conditional probability is P(A | B) = P(A and B) / P(B), with P(B) > 0.

Given the joint probability and P(B), return the conditional probability.

Hint

Restrict the sample space to B and renormalize.

case 1

in: [0.1,0.5]

expected: 0.2

case 2

in: [0,0.25]

expected: 0

case 3

in: [0.3,0.3]

expected: 1

Starter codePython

def conditional_probability_from_joint(joint, p_b):
    # Your code here
    pass

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