Population of a city increase 2.5% annually but is decreased by 0.5 % every year due to migration. What will be the percentage increase in 3 years? एक शहर की जनसंख्या में 2.5% की वृद्धि होती है लेकिन प्रवास के कारण प्रत्येक वर्ष इसमें 0.5 % की कमी हो जाती है | 3 वर्षों में प्रतिशत वृद्धि क्या होगी ?

Net annual increase = birth rate - migration rate = 2.5% - 0.5% = 2% per year. Since population grows by 2% each year, we use compound growth formula. After 3 years: P(1.02)^3 = P × 1.061208. Total increase = 6.1208%. Simply adding 2% + 2% + 2% = 6% would be incorrect because population growth compounds on the increased base each year.