Boy-Girl Paradox Probability

Problem

A family has two children. If condition is the string at_least_one, you know at least one child is a boy and the probability both are boys is 1 / 3. If condition is older, you know the older child is a boy and the probability is 1 / 2.

Return 0.0 for any other condition.

Hint

List the four equally likely boy-girl orders and condition on the information given.

Test cases

case 1

in: ["at_least_one"]

expected: 0.3333333333333333

case 2

in: ["older"]

expected: 0.5

case 3

in: ["unknown"]

expected: 0

Starter codePython

def boy_girl_probability(condition):
    # Your code here
    pass

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