Answer: a.) 3 used books : 7 books in all (3:7)
b.) 3 used books : 4 new books (3:4)
Explanation: a.) there are 6 used books and 14 total books. (6:14) simplified that ratio is (3:7)
b.) there are 6 used books and 8 new books. (6:8) simplified that ratio is (3:4)