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?
Answer : 4
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.
- At IBPS Preparation,We provide pathway for any candidate who wishes to shine in the recruitment process of IBPS.
- Tricks and Formulae2018.10.12How to prepare for bank exam without coaching?
- Announcements2018.06.06IBPS CRP RRBs VII Notification has been Released
- Announcements2018.03.05Equip Yourself with Niche Skills – Take a Giant Leap for your Career
- English2018.03.05How to Prepare for English Section of SSC CGL and IBPS PO Simultaneously?