On children's day 405 sweets were distributed equally among children in such a way that the number of sweets received by each child is 20% of the total number of children. How many sweets did each child receive?  Choices:
A) 15 B) 18 C) 9 D) 45 E) 78
Explanation :   Solution: Let the total number of children be x. then, x*(20% of x) = 405   1/5 * x^2 =405 &lt;==&gt; x^2 = 2025 &lt;==&gt; x =45.   .'. Number of sweets received by each child = 20% of 45 = 9   Answer : 9
<result>C</result>
On children's day 405 sweets were distributed equally among children in such a way that the number of sweets received by each child is 20% of the total number of children. How many sweets did each child receive?