- A8 : 7
- B7 : 9
- C8 : 9
- D9 : 8
Step-by-Step Solution
Q total = 10 + 14 + 16 = 40. S total = 15 + 13 + 17 = 45. Ratio 40 : 45 = 8 : 9.
Answer: C) 8 : 9
Books sold (in hundreds) by 4 stores over 3 years — P: 2021=12, 2022=15, 2023=18; Q: 2021=10, 2022=14, 2023=16; R: 2021=8, 2022=12, 2023=20; S: 2021=15, 2022=13, 2023=17. What is the ratio of total books sold by store Q to total books sold by store S across all three years?
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