Question

A hawker gains the selling price of $4$ gel pens on selling $1$ dozen pens. What is his gain percentage ?

• A. $40\%$
• B. $50\%$
• C. $55\%$
• D. $60\%$

Answer 1

The correct option is B $50\%$

S.P. of 12 gel Pens-C.P. of 12 gel pens= S.P. of 4 gel pens

S.P. of 12 gel Pens=C.P. of 12 gel pens- S.P. of 4 gel pens
$\Rightarrow$ C.P. of 12 gel pens=S.p. of 8 gel pens
Let the S.P. of 1 gel pen = Rs. 1. then

S.P of 8 gel pen=Rs,8
$\therefore$C.P. of 12 gel pens= Rs. 8
S.P. of 12 gel pens= Rs. 12
$\therefore$ Gain= Rs. 12- Rs. 8= Rs. 4
Gain %=$(\frac{4}{8}\times 100)$ %=50%