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If A:B:C = 3:5:7, then find the ratio of (A + 2C) : (4B − C)

Question

If A:B:C = 3:5:7, then find the ratio of (A + 2C) : (4B

− C)

A 17:13 Correct Answer Incorrect Answer

B 11:12 Correct Answer Incorrect Answer

C 18:17 Correct Answer Incorrect Answer

D 10:17 Correct Answer Incorrect Answer

Solution

ATQ,

Let A = 3k, B = 5k, and C = 7k Required ratio = (3k + 2 × 7k) : (4 × 5k − 7k) = (3k + 14k) : (20k − 7k) = 17k : 13k = 17 : 13

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