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Amit bought 25 pens at rupees 8 per pen and 35 pens at rupees 10 per pen. He sold all the 60 pens at rupees 11 per pen. Find his gain percent
Given:
Amit bought 25 pens at rupees 8 per pen and 35 pens at rupees 10 per pen.
He sold all the 60 pens at rupees 11 per pen.
To do:
We have to find his gain percent.
Solution:
Cost price of 25 pens $=Rs.\ 8\times25=Rs.\ 200$
Cost price of 35 pens $=Rs.\ 10\times35=Rs.\ 350$
Therefore,
Total cost price of the pens $=Rs.\ (200+350)=Rs.\ 550$
Selling price of each pen $=Rs.\ 11$
Total selling price of 60 pens $=Rs.\ 11\times60= Rs.\ 660$
Gain $=SP-CP$
$=Rs.\ (660-550)$
$=Rs.\ 110$
Gain $ \%=\frac{Gain}{CP}\times 100 \%$
$=\frac{110}{550}\times100 \%$
$=20 \%$
His gain percent is $20 \%$.
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