If the cost of 10 article …
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Naveen Sharma 7 years, 2 months ago
Ans. Let Cost of 1 Article = x
Cost of 9 Articles = 9x
Then Cost of 10 Articles = 10x
Selling Price of 9 Articles = Cost of 10 Articles = 10x [Given]
Gain = 10x - 9x = x
Gain % = \({Gain \times 100 \over Cost \space Price } = { x \times 100 \over 9x } = {100\over 9 }=11{1\over 9}\%\)
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