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Q:

The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is: 

  • 1
    20 years
  • 2
    15 years
  • 3
    10 years
  • 4
    8 years
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Answer : 2. "15 years "

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