Question

At what percent above the cost price must a shopkeeper mark his goods so that he gains 20% even after giving a discount of 10% on the marked price?

• A. 25%
• B. 30%
• C. 33(1/3)%
• D. 37(1/2)%
• E. 26%

Answer 1

The correct option is C

33(1/3)%

Let C.P. = Rs. 100. Then, S.P. = Rs. 120.

Let marked price be Rs. x. Then, 90% of x = 120 $⟹$ x = $\left(\frac{120\times 100}{90}\right)$ = $133\frac{1}{3}$.

$\therefore$ Marked price = $33\frac{1}{3}$% above C.P.