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The cost price of 36 books is equal to the selling price of 30 books. The gain percent is :
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- 20%
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16 4 % 6 - 18%
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82 2 % 6
Correct Option: A
Let cost price of each books = Rs. 1
Then cost price of 30 books = Rs. 30
Selling price of 30 books = Rs. 36
Profit = Selling price of 30 books - Cost price of 30 books = 36 - 30 = Rs. 6
| ∴ Required profit = | × 100 | cost price |
| Required profit = | × 100 = 20% | 30 |
