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प्रश्न
If selling price = ₹ 900. Discount is 20%, then find the marked price.
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उत्तर
Here, selling price = ₹ 900, discount = 20%
Let the marked price be ₹ 100
Since, the discount given = 20%
∴ Amount of discount = ₹ 20
∴ Selling price = 100 – 20 = ₹ 80
Let actual marked price be ₹ x
∴ For marked price of Rs x, selling price is Rs 900
\[\therefore \frac{900}{x} = \frac{80}{100}\]
∴ 900 × 100 = 80 × x
\[\Rightarrow x = \frac{100}{80} \times 900\]
= `90000/80`
= ₹ 1,125
Thus, the marked price is ₹ 1,125.
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