Subject

    Quantitative Aptitude

    Topic

    Average

    The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years, The age of the 15th student is :

    ক)
    11
    খ)
    12
    গ)
    14
    ঘ)
    13

    Explanation

    Age of the 15th student = [15 ×\times 15 - (14 ×\times 5 + 16 ×\times 9)] = (225-214) = 11 years.

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