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Q. In a laboratory, two bottles contain mixture of acid and water in the ratio 2 : 5 in the first bottle and 7 : 3 in the second. The ratio in which the contents of these two bottles be mixed such that the new mixture has acid and water in the ratio 2 : 3 is :

  • (A) 4 : 15
  • (B) 9 : 8
  • (C) 1 : 2
  • (D) 21 : 8
  • Correct Answer - Option(D)
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