Question

A person buys pencils at 11 for Rs. 10 and sells it at 10 for Rs.11. Find profit%

Answer 1

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Answer:
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Cost price of 11 pencils = 10

Cost price of 1 pencil = 10/11

And SF of 10 pencils = 11

SP of 1 pencil = 11/10

Now,

Gain => 11/10 - 10/11

=> 121-100/110

=> 21/110

And gain % => 21/110 / 10/11 × 100

=> 21 × 11 / 11

=> 21

Answer: Profit = 21%

#Be Brainly❤️

Answer 2

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Cp of 11 pencils = ₹10
Cp of 1 pencil = 10/11 = ₹0.90

Sp of 10 pencils = ₹ 11
Sp of 1 pencil = 11/10 = ₹1.1

Now, our Sp is bigger than our Cp so it's a gain
Gain = sp - cp
=> 1.1 - 0.90
=> 0.2
Gain % = Gain * 100 / Cp
=> 0.2 * 100 / 0.90
=> 22.2 %

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