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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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