the cost price of 15 articles is equal to selling price of 9 articles find gain or loss
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Let the cp of 1 article is rs 10
15 article cp = 150
9 article sp = 150
15 article sp = 150÷9*15=250
gain = 250 - 150 = 100
15 article cp = 150
9 article sp = 150
15 article sp = 150÷9*15=250
gain = 250 - 150 = 100
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