Multiple choice

The average age of fifteen persons is 28 years. If two more persons are added, then the average is increased by 2 years. The new persons have age difference of 8 years. The age (in years) of the younger among the new persons is:

  1. 49

  2. 51

  3. 44

  4. 41

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total age of 15 persons = 15 × 28 = 420 years. After adding 2 persons, total age of 17 persons = 17 × 30 = 510 years. Sum of new persons' ages = 510 - 420 = 90 years. Let younger person's age = x, then older = x + 8. So x + (x + 8) = 90, giving 2x = 82, x = 41 years (option D).