The cost price of 15 books is
equal to the selling price of 12 books find the gain percent
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Let the C.P of 1 book be Rs.1
C.P of 12 books =Rs.12
C.P of 15 books=Rs.15
According to question
C.P of 15 books=S.P of 12 books=Rs.15
Now, C.P of 12 books=Rs.12
S.P of 12 books=Rs.15
Gain%=S.P-C.P/C.P×100
= 15-12/12×100
=3/12×100
=25%
Hope it helps!
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