• # question_answer 18) By selling 24 pens, Kranthi lost an amount equal to the C.P. of 3 pens. Find his loss percentage A)  12.5%B)  13%            C)  12.75%                       D)  13.5%

(a): Let C.P of one pen = x C.P of 3 pens = 3x Let him sell at p% loss $\Rightarrow S.P.=\frac{x(100-p)}{100}$ $\Rightarrow S.P.(24\,pens)=\frac{24x(100-p)}{100}$ $\therefore \frac{24x(100-p)}{100}=21x$ $\Rightarrow 24(100-p)=2100$ $\Rightarrow 300=24p$ $\Rightarrow p=12.5%$