### In a family of 5 members, the average age at present is 33 years. The youngest member is 9 years old. The average age of the family just before the birth of the youngest members was :

A. 30 years B. 29 years C. 25 years D. 24 years Answer: Option A

### Solution(By Apex Team)

According to the question, Average age of 5 members today = 33 years Sum of ages of 5 members today = 33 × 5 = 165 years If the youngest member is 9 year old ∴ Sum of the age of 4 members before the birth of youngest child = 165 – 9 – 4 × 9 = 120 years ∴ Average $=\Large\frac{120}{4}$ =30 years

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years