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If the cost price of 10 greeting cards is equal to the selling price of 8 greeting cards. Find the gain or loss %.please do not give links.



Let the c.p. of 1 card be rs x.
so, the c.p. of 8 cards=rs 8.
since, the s.p. of 8 cards= the c.p. of 10 cards= rs 10.
so, gain=10-8=rs2
1 1 1
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