১৩ টা কলমৰ কিনা দাম ১০ টা কলমৰ বিক্রিৰ দামৰ সমান, লাভ কিমান ?
shinchan142:
Why r u using slang word?
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Let th price of Colombo be 10
13×10=130
cost of 1 pen 13
He is selling 10 pens for 130
So cost of pen 13
Therefore profit is 3 per pen.
Total profit is 10×3 =30
Amake follow koro
Riya112
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