ABC26GN3153 · Ratio and Proportion

Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: · Marks: · Difficulty:

$x$ and $y$ vary inversely with each other. When $x$ is 12, $y$ is 9. The pair which is not a possible pair of corresponding values of $x$ and $y$ is

(a)9 and 12

(b)18 and 6

(c)24 and 18

(d)36 and 3

Answer

Answer (as printed): C

Explanation

$x \propto \frac{1}{y} \Rightarrow xy = k$. When $x = 12, y = 9$, $k = xy = 12 \times 9 = 108$. Clearly, $xy \neq 108$ for $x = 24, y = 18$.

Explanation as extracted from the printed page; notation may be imperfect.