Answers

2014-11-02T17:43:46+05:30
sp of 10 pencils=cp of 11 pencil=x
so cp of one pencil=x/11
and sp of one pencil is =x/10
profit=sp-cp=x/10-x/11
                     =x/110
profit %=profit*100/cp
              =x*100*11/110*x=10%
so profit percentage=10%
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