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    Question

    A girlтАЩs age is 125% of what it was 10 years ago, but

    75% of what it will be after 10 years. What is her present age?
    A 40 years Correct Answer Incorrect Answer
    B 36 years Correct Answer Incorrect Answer
    C 30 years Correct Answer Incorrect Answer
    D 21 years Correct Answer Incorrect Answer

    Solution

    Let the girl's present age be 'x' years. According to question, => 1.25 ├Ч┬а(x-10) = 0.75┬а├Ч┬а(x+10) => 1.25x тАУ 12.5 = 0.75x + 7.5 => 0.5x = 20 => x = 40 years

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