Question

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A shelf at a bookstore displays 30 books. Of these 30 books, 10 of the books are nonfiction books. The store owner adds 4 new fiction books to the shelf and wants the ratio of fiction books to nonfiction books to remain the same. What is the total number of nonfiction books that the store should display, after the new fiction books are added?

Answer 1

2 he needs to add 2 to keep the ratio the same, the total would be 12

Explanation:

before he adds the book the ratio is 2:1 (fiction to non-fiction) and he add 4 to the fiction so he needs to add 2 non-fiction books because this ration means fiction/2 = non-fiction so 4/2 = 2

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