A shopkeeper bought 30 pens for ₹5 each. If he sold all of them at ₹15 per pair, find his profit.

₹50

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₹75

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₹80

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₹100

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Solution

The correct option is B ₹75
Cost price of 1 pen = ₹5
Selling price of 2 pens = ₹15
Total number of pens bought = 30

Selling price of 1 pen = $\frac{15}{2}$ = ₹7.5 [Since, selling price of 2 pens = ₹15]

Profit of 1 pen = SP of 1 pen - CP of 1 pen
= ₹7.5 - ₹5
= ₹2.5

Profit gained by the shopkeeper after selling all 30 pens $= ₹ 30 \times 2.5 = ₹ 75$

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