Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New ...

A Venn diagram captioned: "In a survey of 250 European travelers ... The area of intersection is labeled 70. Funding for this project is provided by the National Science Foundation.

In set notation this is B = {1, 4, 9}. 30 people answered a survey about whether they have a dog or a cat. The Venn diagram shows the information from the survey. 13 people have got a dog.