Question

    The ratio of acid to water in solutions A and B is 2 : 7

    and 4 : 5, respectively these solutions are mixed in the ratio of 4 : 3. What is the ratio of acid to water in the resulting solution?  
    A 25 : 21 Correct Answer Incorrect Answer
    B 23 : 40 Correct Answer Incorrect Answer
    C 21 : 40 Correct Answer Incorrect Answer
    D 20 : 43 Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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