Question

Use the image to answer the question.

A tree diagram splits into 2 levels.
▼Click for Long Desc
The top level is unlabeled and splits into two branches upper B and upper G. This level is labeled first child. The first child upper B branch splits into two branches upper B and upper G. The first child upper G branch splits into branches upper B and upper G. This level is labeled second child.


Newlyweds Katherine and Matthias plan to have two children. Assuming it is equally likely to be a boy or a girl, use the tree diagram to help you find the probability that their second child is a girl, given that their first child is a boy.

(1 point)
Responses

12

Start Fraction 1 over 2 End Fraction

34

Start Fraction 3 over 4 End Fraction

14

Start Fraction 1 over 4 End Fraction

1/8

Answer 1

If the first child is a boy, the remaining possibilities are (boy, boy) and (boy, girl). Each is equally likely, so the probability the second child is a girl is 1/2.