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If the cost price of 10 articles is equal to the selling price of 7 articles, then the gain or loss percent is :
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- 51% gain
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42 6 % gain 7 - 35% loss
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42 6 % loss 7
Correct Option: B
Let C.P. of each article be $ 1
Then, C.P. of 7 articles = $ 7
S.P. of 7 articles = $ 10
| ∴ Gain % = | × 100 = | 7 | 7 |
| Gain % = 42 | % | 7 |
Second method to solve this question :
Here, p = 10, q = 7
| Profit % = |  | p - q |  | × 100 | |
| q |
| Profit % = | | 10 - 7 | | × 100 | |
| 7 |
| Profit % = | = 42 | % | 7 | 7 |
