Question

A shopkeeper allows a discount of ₹40 to his customers and still gains ₹80. Find the marked price of an article which costs ₹450 to the shopkeeper.
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Answer 1

Selling price = cost price + profit = 450 + 80 = ₹530
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\left[1\right]$
Marked price = selling price + discount = 530 + 40 = ₹570
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\left[1\right]$