The cost price of an article is x. It is marked up by 150%. It is sold at Rs 600 after giving 40% discount. What is x (in Rs)?
It is marked up by 150% and 40% discount is allowed
$$SP = \frac{100-40}{100} \times \frac{100+150}{100} \times CP$$
$$\Rightarrow 600 = \frac{60}{100} \times \frac{250}{100} \times CP$$
$$\Rightarrow CP = 400$$
so the answer is option A.
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