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A person buys some pencils at 5 for a rupee and sells them at 3 for a rupee. His gain percent wll be :
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66 2 % 3 -
76 2 % 3 -
56 2 % 3 -
46 2 % 3
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Correct Option: A
Given that , C.P. of 5 pencils = $ 1.
| S.P. of 5 pencils = $ | 3 |
| Gain = | - 1 = | 3 | 3 |
We can find required answer with the help of given formula :
Here, a = 5, p = 1 and b = 3, q = 1
| Gain % = |  | aq - bp | × 100% |  | |
| bp |
| Gain % = | × 100% | 3 |
| Gain % = | = 66 | % | 3 | 3 |
