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easyMCQSSC CGL2026Quantitative Aptitude
1 mark

The average weight of 5 boys is increased by 9 kg when one of them, whose weight is 39 kg, is replaced by another boy. What is the weight (in kg) of the new boy?

  1. A
    69
  2. B
    65
  3. C
    70
  4. D
    84

Solution & Step-by-step Explanation

Number of boys = 5
Increase in average weight = 9kg

Total increase in weight = 5×9=45kg

Weight of new boy = Weight of replaced boy + Total increase

Weight of new boy=39+45=84kg

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The average weight of 5 boys is increased by 9 kg when one of them, whose weight is 39 kg, is replaced by another boy. What is the weight (in kg) of the new boy?
A
69
B
65
C
70
D
84

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