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    Question

    P is 7 years older than her sister. Her sister is 25

    years younger than her friend. If the ratio between the ages of P and her sister’s friend is 3:5, then what will be the age of P’s sister after 3 years? 
    A 25 years Correct Answer Incorrect Answer
    B 23 years Correct Answer Incorrect Answer
    C 16 years Correct Answer Incorrect Answer
    D 28 years Correct Answer Incorrect Answer
    E 30 years Correct Answer Incorrect Answer

    Solution

    Let the age of P = x and her sister’s age = x - 7 Sister’s friend age = (x – 7) + 25 = x + 18 Ratio between the ages of P and her sister’s friend is 3:5. => x/(x+18) = 3/5 => 5x = 3x + 54 => 2x = 54 => x = 27 P’s sister age = 27 – 7 = 20 After 3 years P’s sister age = 20 + 3 = 23 years  

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