According to stem analysis, the number of boys is (80.1-76) ÷ (76-75) = 4.1times that of girls.

Then the total number of girls is 5. 1 times, so the total number of girls should be a multiple of 5 1.

Because the total number of people is between 380 and 450, the total number of people is 408.

If there are x girls, there are 408-x boys. According to the meaning of the question, we can get the equation:

80. 1x+75(408-x)=76×408，

80. 1x+30600-75x = 3 1008，

5. 1x=408，

x=80，

Then the boy is: 408-80=328 (person),

A: There are 328 boys and 80 girls.