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A fruit seller buys lemons at 2 for a rupee and sells them at 5 for three rupees. His profit percent is
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- 10%
- 15%
- 20%
- 25%
Correct Option: C
Suppose, number of lemons bought = LCM of 2, 5, 3 = 30
| ∴ CP of 30 lemons = $ |  | 1 | × 30 |  | = $ 15 | |
| 2 |
| SP of 30 lemons = $ | | 3 | × 30 | | = $ 18 | |
| 5 |
∴ Gain = SP of 30 lemons - CP of 30 lemons = 18 - 15 = 3
| ∴ Gain percent = | × 100 = 20% | 15 |
We can find required answer with the help of given formula :
Here, a = 2, p = 1 and b = 5, q = 3
| Gain % = | | aq - bp | | × 100% | |
| bp |
| Gain % = | | 2 × 3 - 5 × 1 | | × 100% | ||
| 5 × 1 |
| Gain % = | × 100% = 20% | 5 |
