Multiple Choice Questions on In a class there are 72 boys whose average age is decreased by 2 5 months when 1 boy aged 30 y........... for CAPF (AC) Exam Preparation

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Multiple Choice Questions

In a class there are 72 boys whose average age is decreased by 2 5 months when 1 boy aged 30 y...........

Quantitative Aptitude( Paper-I ) Average
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     In a class there are 72 boys whose average age is decreased by 2.5 months, when 1 boy aged 30 years is replaced by a new boy. Find the age of the new boy.  

     

    This questions was previously asked in
    CAPF 2014 Paper-1
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    15 years

    Correct Answer

    16 years

    Incorrect Answer

    17 years

    Incorrect Answer

    18 years

    Incorrect Answer
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    Explanation:

    effect on tatal age of the classs= 72x2.5=180
    or 15 years decrease so the age of new boy will be 
    30-15=15 years

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