Maria has the following numbers of books in her collection.
9 autobiographies 6 mysteries 8 nonfiction books 6 cookbooks 7 novels.
If Maria buys 3 more cookbooks, what happens to the average number of books across types of
books in her collection?
The average of the original data set, 6,6,7,8,9 is 7.2. The average of the new data set with 3 more cookbooks 6,7,8,9,9 is 7.8. Therefore it increases by 0.6, hope that makes sense :)
