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If an alloy contains copper and silver in the ratio 3:7, then the percentage quantity of silver in the alloy is: 

Question: If an alloy contains copper and silver in the ratio 3:7, then the percentage quantity of silver in the alloy is:
  • A. (A) 90%
  • B. (B) 70% ✓
  • C. (C) 60%
  • D. (D) None of these
Correct Answer: B. (B) 70%
Explanation: null

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