Banking Exams Quant — Question 1810
Question
The average age of a family of 5 members is 24 years. If the youngest member is 8 years old, what was the average age of the family at the time of the youngest member's birth?
- 16 years
- 18 years
- 20 years
- 22 years
Correct answer
C — 20 years
Explanation (English)
Present total = 5 × 24 = 120. Other 4 members' present total = 120 − 8 = 112. Eight years ago (at the birth) their total = 112 − 4×8 = 80, and the family then had 4 members. Average = 80/4 = 20 years.
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