Mathematics · Ratio and Proportion
If A ∶ B = 5 ∶ 7 and B ∶ C = 9 ∶ 11, then A ∶ C is equal to:
- 139 ∶ 77
- 245 ∶ 66
- 345 ∶ 77✓
- 49 ∶ 11
Correct answer
45 ∶ 77
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