Six years ago, the average age of a family of father, mother and son was 34 years. Three years ago, the average age of the father and mother was 45 years. What is the present age of the son (in years)?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 24
Bring both totals to the present: each member adds one year to the total every year.
Total of all three six years ago \(=3\times34=102\) years
Total of all three now \(=102+3\times6=120\) years
Total of father and mother three years ago \(=2\times45=90\) years
Total of father and mother now \(=90+2\times3=96\) years
Son's present age \(=120-96=24\) years