Question : The following table represents the population of four different areas and the percentage of males, females, and children among them.
What is the total number of children in areas P and Q together?
Option 1: 7000
Option 2: 9000
Option 3: 6000
Option 4: 8000
Correct Answer: 8000
Solution : The total number of children in areas P and Q together = Number of children in area P + number of children in area Q = 20% of 10,000 + 30% of 20,000 = $\frac{20}{100}\times10000+\frac{30}{100}\times 20000$ = $2000+6000$ = $8000$ Hence, the correct answer is 8000.
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