Average age of a family of 4 members was 19 years, 4 years back. Birth of a…
20262023
Average age of a family of 4 members was 19 years, 4 years back. Birth of a new child kept the average age of the family same even today. How old is the child today?
Answer: C. 3 Year — Key facts: average of family 4 years ago = 19 years. Total age of the four members four years ago = 4 × 19 = 76 years. After 4 years the same four members…
- A.
1 Year
- B.
2 Year
- C.
3 Year
- D.
4 Year
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Correct answer: C
Key facts: average of family 4 years ago = 19 years.
Total age of the four members four years ago = 4 × 19 = 76 years.
After 4 years the same four members together add 4 × 4 = 16 years, so their total now = 76 + 16 = 92 years.
Let the child’s age today be x. There are now 5 members and the average today remains 19, so total ages today = 5 × 19 = 95 years. Therefore x = 95 − 92 = 3.
Final answer: The child is 3 years old today.