Question
Ira is younger than Vivan by 7 years and their ages are in the respective ratio of 7 : 9. How old is Ira?
A. 24
B. 24.5
C. 23.5
D. 25
Answer: B. 24.5
Solution:
Let age of Ira and Vivan be 7x and 9x respectively.
9x − 7x = 7
⇒ 2x = 7
⇒ x = 3.5
Ira’s age = 7x
= 7 × 3.5
= 24.5