The cost price of 10 articles is equal to the selling price of 9 articles.Find the profit percent.
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ANSWER
11 1/9%
EXPLANATION
CP of 1 article is x
CP of 10 article is 10x=SP of 9 articles
CP of 9 articles =9x
profit= SP - CP
= 10x -9x = x
profit (%) = profit /CP x 100
= x/9x x 100
= 100/9 = 11 1/9%
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