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 AShow Answer
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
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