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At what percent above the cost price, must a shop–keeper marks his goods so that he gains 20% even after giving a discount of 10% on the marked price?
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- 25%
- 30%
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33 1 % 3 -
37 1 % 2
Correct Option: C
Let the CP be $ 100. Then,
SP = $ 120.
Let the marked price be y.
Then, 90% of y = 120
| ⇒ y = | = | 90 | 3 |
| y = 133 | % | 3 |
| It means he should mark 133 | % higher than C.P. | 3 |
