A town's population increases by 25% in one year and decreases by 20% in the next year. If the population after two years is 96,000, what was the original population? / किसी नगर की जनसंख्या एक वर्ष में 25% बढ़ती है और अगले वर्ष 20% घटती है। यदि दो वर्षों बाद जनसंख्या 96,000 है, तो प्रारंभिक जनसंख्या कितनी थी?
Answer and explanation are free to read — no sign-in required. / उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answer / सही उत्तर
C. 96,000 / 96,000
Explanation / व्याख्या
Overall multiplier = 1.25 × 0.80 = 1. Therefore the population after two years is equal to the original population. Hence original population = 96,000. / कुल गुणक = 1.25 × 0.80 = 1। अतः दो वर्ष बाद जनसंख्या मूल जनसंख्या के बराबर होगी। इसलिए प्रारंभिक जनसंख्या = 96,000।
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