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      Question

      Two mixtures (milk and water) 'A' and 'B' contains

      quantities of milk and water in ratio of 1:4 and 3:7, respectively. If 25 ml from 'A' and 50 ml from 'B' are mixed to form a new mixture, then find the percentage of water in the new mixture.
      A 68% Correct Answer Incorrect Answer
      B 71% Correct Answer Incorrect Answer
      C 73% Correct Answer Incorrect Answer
      D 76% Correct Answer Incorrect Answer
      E 79% Correct Answer Incorrect Answer

      Solution

      Quantity of water in 25 ml of mixture 'A' = 25 Γ— (4/5) = 20 ml
      Quantity of water in 50 ml of mixture 'B' = 50 Γ— (7/10) = 35 ml
      Total quantity of final mixture = (25 + 50) = 75 ml
      Required percentage = ((20 + 35) Γ· 75) Γ— 100 = 55/75 Γ— 100 = 73.33% β‰ˆ 73%

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