【Question 10】
A grade has three classes: Class A, Class B, and Class C. Class A has 4 more girls than Class B, and Class B has 1 more girl than Class C. If the first group of Class A is moved to Class B, the first group of Class B is moved to Class C, and the first group of Class C is moved to Class A, then the number of girls in the three classes will be exactly equal. If it is known that the first group of Class C has 2 girls, then the first group of Class A has $\qquad$ girls, and the first group of Class B has $\qquad$ girls.
【Analysis and Solution】
Average number problem.
Taking the "original number of girls in Class C" as the benchmark, Class B has 1 more girl than Class C, and Class A has $4+1=5$ more girls than Class C; Class C has increased by $(1+5) \div 3=2$ girls compared to the original, Class B has increased by 2-1=1 girl compared to the original, and Class A has decreased by 5-2=3 girls compared to the original; Class A's first group has $3+2=5$ girls;
Class B's first group has $5-1=4$ girls.