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Unit 5 · Mathematical Reasoning and Aptitude Paper 1 · 26 June 2025 Evening

The price of a jewel, passing through three hands, rises on the whole by 65%. If the first and second sellers earned 20% and 25% profit respectively, then find the percentage of profit earned by the third seller.यदि एक जेवरात तीन विक्रेताओं के हाथों से गुजरता है तो उसकी कीमत पूरे 65% बढ़ जाती है। यदि प्रथम और द्वितीय विक्रेता को क्रमशः 20% और 25% लाभ होता है तो तृतीय विक्रेता द्वारा अर्जित लाभ प्रतिशत ज्ञात कीजिए।

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Correct answer: A. 10

Explanation

Successive profits multiply: 1.20 × 1.25 × (1 + x/100) = 1.65. Since 1.20 × 1.25 = 1.50, we get 1 + x/100 = 1.65 ÷ 1.50 = 1.10, so x = 10 %.क्रमिक लाभ गुणित होते हैं: 1.20 × 1.25 × (1 + x/100) = 1.65। चूँकि 1.20 × 1.25 = 1.50, अतः 1 + x/100 = 1.65 ÷ 1.50 = 1.10, इसलिए x = 10 %।

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