एक व्यक्ति अपनी आय का 60% खर्च करता है। उसकी आय में 30% की वृद्धि हुई और उसने अपने व्यय में 20% की वृद्धि की। तब उसकी बचत प्रतिशत में कितनी वृद्धि होगी?

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SSC Selection Post 2024 (Higher Secondary Level) Official Paper (Held On: 25 Jun, 2024 Shift 4)
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  1. 48%
  2. 45%
  3. 46%
  4. 42%

Answer (Detailed Solution Below)

Option 2 : 45%
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दिया गया है:

एक व्यक्ति अपनी आय का 60% खर्च करता है। उसकी आय में 30% की वृद्धि हुई और उसने अपने व्यय में 20% की वृद्धि की। 

प्रयुक्त सूत्र:

प्रारंभिक बचत = आय - व्यय

नई बचत = नई आय - नया व्यय

बचत में प्रतिशत वृद्धि = \(\dfrac{New Savings - Initial Savings}{Initial Savings} \times 100\)

गणना:

मान लीजिए प्रारंभिक आय 100 है।

प्रारंभिक व्यय = 100 का 60% = 60

प्रारंभिक बचत = 100 - 60 = 40

नई आय = 100 + 100 का 30% = 100 + 30 = 130

नया व्यय = 60 + 60 का 20% = 60 + 12 = 72

नई बचत = 130 - 72 = 58

बचत में प्रतिशत वृद्धि = \(\dfrac{58 - 40}{40} \times 100\)

\(\dfrac{18}{40} \times 100\)

45%

∴ सही उत्तर विकल्प (2) है।

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