Math Quiz: NYT Learning Network

Through Math for America, I am part of an on-going collaboration with the New York Times Learning Network.  My latest contribution, a Test Yourself quiz-question, can be found here:

https://learning.blogs.nytimes.com/2011/07/25/test-yourself-math-july-25-2011/

This problem was created after playing around with a great New York Times interactive infographic, “How Many Households are Like Yours?”.