The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member?

The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member?

  1. 13.5
  2. 14
  3. 15
  4. 12.5

Answer : 4

Solution

At present the total age of the family = 5 * 20 = 100

The total age of the family at the time of the birth of the youngest member = [100-10-(10*4)] = 50

Therefore, average age of the family at the time of birth of the youngest member = 50/4 = 12.5.

Facebook Comments

Author Profile

IBPS Preparation Team
IBPS Preparation Team
At IBPS Preparation,We provide pathway for any candidate who wishes to shine in the recruitment process of IBPS.
© Copyright 2017 - All Rights Reserved | DesignzRush (OPC) Pvt. Ltd.
Complete Solution for Banking Exams in India
Inline
Inline