A is younger than B by 7 years. If their ages are in the respective ratio of 7 : 9 then how old is A?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 24.5 years
Ages in the ratio 7 : 9 can be written as \(7k\) and \(9k\). Their difference, \(2k\), is the 7 years by which A is younger.
\(9k-7k=7\), so \(k=3.5\)
A’s age \(=7\times3.5=24.5\) years