Respuesta :

Answer: A= 75 B= 25


Explanation:
The whole thing makes up 200. It is divided into 8 pieces meaning each piece is worth 25.

Year 7 is 3 pieces so 25 * 3= 75
Year 7 has 75 pupils.

Year 9 is 1 piece so 25 * 1 = 25
Year 9 has 25 pupils.