Average monthly income of Country A = (9,500 + 10,500 + 9,800 + 1,000 + 10,200) ÷ 5 = 41,000 ÷ 5 = ₹8,200
Answer: (A) 8,200
Add all five values for Country A and divide by 5 (number of citizens). Note that citizen IV has a very low income (₹1,000), which pulls the average down — this is exactly the kind of limitation of averages discussed in Chapter 1 (Development). Examiners expect the simple arithmetic calculation shown clearly.