If the price of eraser is reduced by 25%. A person can buy 2 more erasers for a rupee. How many erasers are available for a rupee after reduction ?

Answer: Option A

Let n erasers be available for a rupee
Reduced Price $$=\frac{75}{100}\times 1=\frac{3}{4}$$
$$\frac{3}{4}$$ rupee fetch n erasers = 1 Rupee will fetch $$\left(\text{n}\times \frac{4}{3}\right)$$  erasers
Therefore,
$$\begin{array}{rl}& \frac{4n}{3}=n+2\\ & \Rightarrow 4n=3n+6\\ & \Rightarrow n=6\end{array}$$
Now total number of erasers are available for a rupee = 6 + 2 =8