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    Question

    The current average age of Ayan, Rohit and Mohan is 27

    years, whereas the average age of Rohit and Mohan is 30 years. If Ayan is 5 years younger than Mohan, determine the average age of Ayan and Rohit.
    A 18 yrs Correct Answer Incorrect Answer
    B 22.5 yrs Correct Answer Incorrect Answer
    C 30 yrs Correct Answer Incorrect Answer
    D 27.5 yrs Correct Answer Incorrect Answer

    Solution

    ATQ,


    Total present age of Ayan, Rohit and Mohan = 27 × 3 = 81 years

    Total age of Rohit and Mohan = 30 × 2 = 60 years

    So, present age of Ayan = 81 - 60 = 21 years

    Since Ayan is 5 years younger than Mohan,

    Present age of Mohan = 21 + 5 = 26 years

    Then, present age of Rohit = 60 - 26 = 34 years

    Required average = (21 + 34) / 2 = 55 / 2 = 27.5 years

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