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Discussion

  1. In a class, there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy. The age of the new boy is ?
    1. 14 years 8 months
    2. 15 years
    3. 16 years 4 months years
    4. 17 years 10 months years
  1. Correct Option: A

    Total decrease
    = ( 20 X 2 ) months
    = 3 years 4 month
    ∴ Age of the new boy
    = ( 18 years ) – ( 3 years 4 months)
    = 14 years 8 month


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