The average age of Ram and Rahim is 10 years. The average age of Rahim and Ramesh is 15 years. The average age of Ram and Ramesh is 20 years. What is the age of the eldest of the three?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 25 years.
Average = Sum of observation/Number of observations
The sum of the age of Ram and Rahim = 20
The sum of the age of Rahim and Ramesh = 30
The sum of the age of Ram and Ramesh = 40
The sum of the age of Ram, Rahim, and Ramesh = 45
Age of Ramesh = 25
Age of Ram = 15
Age of Rahim = 5
Hence, the age of the eldest is 25 years.