CNN News Clip

"Do you know anything about a Brass Monkey, Jay?" asked Tom. "Do I ever!" exclaimed Jay. "Let me show you a letter I wrote to Heublein over two decades ago. They had this advertising campaign, which was a puzzle. It received a lot of response. Anyway, I solved the puzzle by finding the intersection of two sets...."

In this section, Tom will learn not only about a Brass Monkey but also about three operations on sets, namely union, intersection, and complementation.