If a : b = 5 : 7, then (5a – 3b) : (4a – 2b) is equal to:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 2 ∶ 3
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Understanding |
Application |
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a : b = 5 : 7 Let, a = 5x and b = 7x |
(5a – 3b) : (4a – 2b) = (5 × 5x – 3 × 7x) ∶ (4 × 5x – 2 × 7x) = (25 – 21)x ∶ (20 – 14)x = 4 ∶ 6 = 2 ∶ 3 |