Multiple choice

The average age of 15 persons is 60 years. The average age of first fourteen persons is 55 years. What is the age of the fifteenth person?

  1. 90 years

  2. 100 years

  3. 110 years

  4. 120 years

  5. 130 years

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

Total age of 15 persons = 15 × 60 = 900 years. Total age of first 14 persons = 14 × 55 = 770 years. Age of 15th person = 900 - 770 = 130 years. This makes the claimed answer E correct.