8,400 children = 35% of the total population.<br><br>
Let the total population be T.<br>
35% of T = 8,400.<br>
T = 8,400 × \( \frac{100}{35} \) = 8,400 × \( \frac{20}{7} \) = 24,000.<br><br>
Final Answer: 24,000