A nice probability problem to talk thorugh with kids

Saw this problem from the 2012 AMC 10 b tonight:

Screen Shot 2016-01-28 at 7.19.10 PM

you can find the problem (and the entire test) here:

The 2012 AMC 10b on Art of Problem Solving’s site

It looked like a neat problem to talk through with both of the boys. I started with my older son first:

Next up was my younger son who had some fun with it, too: