By selling 90 ball pens for ₹ 160, a person loses 20%. How many ball pens should be sold for ₹ 96 so as to… · ABC26GN2680

S.P. of 90 ball pens $=₹ 160$, Loss $=20 \%$. C.P. of 90 ball pens $=₹\left(\frac{100}{80} \times 160\right)=₹ 200$. ∴ Desired S.P. of 90 ball pens $=₹\left(\frac{120}{100} \times 200\right)=₹ 240$. For ₹ 240, ball pens sold = 90. For ₹ 96, ball pens sold $=\left(\frac{90}{240} \times 96\right)=36$.