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  9. Q146

CGPSC 2011 · Question 146 of 146

The average age of a six-member family is 22 years. If the age of the youngest member is 7 years, then the average age of the family at the time of birth of the youngest member was

Averages

  1. A18 yearsCorrect
  2. B20 years
  3. C16 years
  4. D19 years

Answer: A. 18 years

Explanation

Total age now = 132; seven years ago the five older members totalled 132 - 7 - 5x7 = 90, giving an average of 90/5 = 18 years.

Source: CGPSC PCS Prelims 2011 GS Paper, solved paper via iasexamportal.com

← Q145View full paper (146 questions)

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