Question

how much percent is gain by buying a notebook for rupees 20 and selling it for rupees 22.50​

Answer 1

The answer is in the attachment

Answer 2

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★ Given:-

Let the Cost Price of one notebook be Rs 1.

Therefore, cost Price of 16 notebooks = Rs 16

And Selling Price of 12 notebooks = Rs 16

Selling Price of one notebook = 16/12

Therefore, Selling Price of 16 notebooks is

→ 16/12 × 16

Gain = selling Price of 16 Notebooks - Cost Price of 16 Notebooks

→ 16 × 16/12 - 12

→ 16 × 16 - 16 × 12 /12

→16 (16 - 12)/12

→ 16 × 4/12

→ 16/3

Hence, gain % = Gain / Cost Price of 16 Notebooks × 100

→ (16/3)/16 × 100

→ 16/3 × 1/16 × 100

→ 100/3

→ Gain % = 33.33%

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