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Part of the stock spoils or is thrown away: price for the rest to reach a target profit, or the part lost

This type of question, asked 3 times: 19 Jul 2023 S4, 17 Sep 2024 S1, 14 Sep 2025 S3. All 3 questions below, oldest first.

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  1. Question 1

    19 Jul 2023 S4

    60
    Aditya buys 300 mangoes for Rs.1,100. Some of these mangoes are rotten and are thrown away. He sells the remaining mangoes at Rs.5 each and makes a profit of Rs.150. Find the percentage of mangoes thrown away.

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  2. Question 2

    17 Sep 2024 S1

    69
    If a shopkeeper sells sugar at ₹44.8 per kg, he is able to make a 12% profit. Due to water seepage, 15\frac{1}{5} of the sugar is damaged. What should now be the selling price per kg of the rest of the sugar to have a 5% profit?

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  3. Question 3

    14 Sep 2025 S3

    59
    A flower vendor bought 200 flowers for ₹800. 20 flowers withered and became unsellable. At what price per flower should he sell the remaining flowers to earn a profit of 30%30\% on his total cost?

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