The ratio of cost price and selling price is 11:10 . The loss % is
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CP/SP=11:10----->(1)
Let CP=100,loss%=x =>SP=100-x
CP/SP=100/100-x
100/100-x=11/10 (from 1)
1000=1100-11x
=>11x=100
X=100/11
=> loss % = 9.09%
Praneeth2005:
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