Question

There are 14 people in a family and the average age of the people is 50. A newborn joins the family. After 4 years what will be the average age of all the people in the family?
1. 50.6
2. 53
3. 60.5
4. 55
5. 55.5

Answer 1

Correct Answer - Option 1 : 50.6

Given:

Average age of 14 people = 50

Calculations:

Total age of all the people in the family = 50 × 14 = 700

Newborn joins the family and 4 years later the total age of all the members = 700 + (15 × 4)

⇒ 700 + 60

⇒ 760

∴ Required average = 760/15

⇒ 50.6

The average age after 4 years is 50.6.