Simple Explanation
Population \(= Density \times Area\) है। इसलिए population ratio \(5 \times 6 : 4 \times 5 = 30:20 = 3:2\) होगा। अतः तीसरा विकल्प सही है। केवल density ratio या area ratio को population ratio मानना incorrect है क्योंकि population दोनों का product है। परीक्षा में ऐसे questions के लिए \(P=D \times A\) relation सबसे सीधा तरीका देता है। / Population equals density multiplied by area. Therefore, the population ratio is \(5 \times 6 : 4 \times 5 = 30:20 = 3:2\). Thus the third option is correct. Treating either the density ratio or the area ratio alone as the population ratio would be incorrect because population depends on their product. In examinations, \(P=D \times A\) provides the most direct method for such ratio questions.
