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    Question

    30% of 200 – 20% of 50 = 10% of

    ?
    A 600 Correct Answer Incorrect Answer
    B 400 Correct Answer Incorrect Answer
    C 500 Correct Answer Incorrect Answer
    D 450 Correct Answer Incorrect Answer
    E 300 Correct Answer Incorrect Answer

    Solution

    30% of 200 – 20% of 50 = 10% of ?
    0.10 × ? = 0.30 × 200 – 0.20 × 50
    0.10 × ? = 60 – 10
    0.10 × ? = 50
    ? = 500

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