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Correct Answer:
D) Rs. 70
Description for Correct answer:
Let the C.P. of the article = Rs. x
∴ Profit = x %
∴ S.P. (100+x100)x=75
=x+75x100=75
∴100x+x2=75×100
x2+100x−7500=0
(x+150)(x−150)=0
∴x−50=0=>x=50
x+150=0=>x=−150
∴ The cost price of the article
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