Ratio & Proportion · Question 21 · Medium
If (4x + 3y) : (3x + 5y) = 6 : 7, what is x : y?
- 10 : 9
- 3 : 5
- 9 : 10
- 7 : 6
Answer and explanation
Answer: C. 9 : 10
Explanation: 7(4x + 3y) = 6(3x + 5y) gives 28x + 21y = 18x + 30y, so 10x = 9y and x : y = 9 : 10.
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