Question
Download Solution PDFThe average age of a family of six members is 30 years. The youngest members of the family are twins with age 10 years. Find the average age of the family just before the birth of the twins.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The average age of a family of six members is 30 years
Calculation:
Total age of the 6-member family now = (30 × 6) = 180
Total age of the family if we exclude twins of age 10 years = (180 - 20) = 160
Now, before 10 years total age of the 4-member family = 160 - (4 × 10) = 120
So, before 10 years average age of the 4-member family = (120/4) = 30 years
∴ The correct answer is 30 years
Last updated on Jun 19, 2025
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