Think of formula of profit. Selling price should be more than cost price.
Discounted price should be taken away from the marked price.
What percent does he need to pay?
Find difference of marked price and paid amount.
Let total matches = x.
Find the discounted price of the items that Vineet buys at marked price.
Convert both inÂ fractionÂ or in percentage.
Find the total number of rings.
Increased means making bigger and we need to add.
Think of formula of percentage.
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