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Mathematics, 05.10.2019 20:30 ninaaforever

There are 15 books on a shelf. 6 of these books are new.(
a. what is the ratio of all books to used books? (
b. what is the ratio of new books to used books?

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There are 15 books on a shelf. 6 of these books are new.(
a. what is the ratio of all books to...
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