Supply the two missing figures in order indicated by $x$ and $y$ in the given equation, the fractions being in their lowest terms. (IGNOU, 2003) $5 \frac{1}{x} \times y \frac{3}{4}=20$
(a)3, 1
(b)3, 3
(c)4, 1
(d)5, 3
Answer
Answer (as printed): B
Explanation
Given equation is: $\frac{(5 x+1)}{x} \times \frac{(4 y+3)}{4}=20$ $$\Leftrightarrow(5 x+1)(4 y+3)=80 x$$ Clearly, $x=3$ and $y=3$ satisfy (i).
Explanation as extracted from the printed page; notation may be imperfect.