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Oranges are bought at the rate of 10 for $ 25 and sold at the rate of 9 for $ 25. The profit percent is
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9 1 % 11 - 10 %
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11 1 % 9 -
12 1 % 2
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Correct Option: C
Suppose the number of oranges bought = LCM of 10 and 9 = 90
| C.P. of 90 oranges = | × 90 = $225 | 10 |
| S.P. of 90 oranges = | × 90 = $ 250 | 9 |
Profit = S.P. of 90 oranges - C.P. of 90 oranges = 250 - 225 = $ 25
| Profit % = | × 100 | 225 |
| Profit % = | = 11 | % | 9 | 9 |
Second method to solve this question :
Here, a = 10, p = 25 and b = 9, q = 25
| Gain % = |  | aq - bp |  | × 100% | |
| bp |
| Gain % = | | 10 × 25 - 9 × 25 | | × 100% | |
| 9 × 25 |
| Gain % = | | 250 - 225 | | × 100% | |
| 9 × 25 |
| Gain % = | = 11 | % | 9 | 9 |
