X is 5 years older than Y. The total of the current ages of X and Y is 33 years. What will be the age of Y after 7 years?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 21 years
Let the present ages of X and Y be A and B years.
X is 5 years older than Y
⇒ A = B + 5
The total sum of the current ages of X and Y is 33 years.
⇒ A + B = 33
⇒ B + 5 + B = 33
⇒ 2B = 33 - 5
⇒ 2B = 28
⇒ B = 14
The present age of Y = 14 years
Age of Y after 7 years = 14 + 7 = 21 years
Hence, Option 2 is the correct answer.