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If the ages of 3 persons are 17, 16, and 12, and another person is added making the average age 20, what is the age of the new person?
  1. 40
  2. 30
  3. 35
  4. None of these
Explanation

Total of 3 ages = 17 + 16 + 12 = 45

New average = 20, for 4 people → Total = 20 × 4 = 80

Age of 4th person = 80 − 45 = 35


Last verified on 23-10-2026

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