Question

By selling 8 dozen pencils, a shopkeeper gains the selling price of one dozen pencils
his gain per cent.​

Answer 1

Answer:

Please see the attachment

Answer 2

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By selling 8 dozen pencils, a shopkeeper gains the selling price of one dozen pencils

his gain per cent.

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$\underline{\underline \bold \pink{method}} \: \: : \: \sf{let \: sp \: of \: 1dozen \: pencil \: be \: x}$

Selling price of 8 dozen pencil will become = 8x

Profit = selling price of dozen pencil = X

cost price of 8 dozen pencil = 8x-x= 7x

$\boxed{gain\% = \frac{profit }{cp} \times 100}$

$gain\% = \frac{x}{7x} \times 100 \\ \boxed{gain\% = 14.28}$