# The cost price of 15 dozen notebooks is equal to the selling price of 12 notebooks .find the gain percent?

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Let the Cost Price of one Dozen notebooks be Rs 1

Therefore , Cost Price of 15 dozen notebooks = Rs 15

and Selling Price of 12 notebooks = Cost Price of 15 Dozen Notebooks

=15

= 15*15 - 15*1=225 - 15 =

Gain % = Gain /cost Price *100

= 210/15*100

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so the Cp of each notebook=x/180

the Sp of 12 notebooks =x

SO the sp of each notebook=x/12

[tex]GAin=[tex] \frac{x}{12} - \frac{x}{180} = \frac{168x}{180X12} Profit %=(gain/Cp)X100= (\frac{168x}{180X12} X 180/x)X100=1400%