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If the cost price of 20 pens is equal to the selling price of 15 pens, Find the gain percent.
1. 25%
2. 30%
3. 41.15%
4. 33.3%

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Correct Answer - Option 4 : 33.3%

Given:

The cost price of 20 pens is equal to the selling price of 15 pens

Formula used:

Gain = selling price – cost price

Gain % = (Gain × 100)/C.P

Calculation:

Let cost price be 1 pen is Rs. x

Then, the cost price of 15 pens = Rs. 15x

The selling price of 15 pens = Rs. 20x

According to the question:

Gain = 20x – 15x = 5x

Gain % = (5x × 100)/15x

⇒ 100/3 = 33.3%

∴ The gain percent is 33.3%.

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