Question

if u can help me thank u

Answer 1

Answer:

pupils in year 7 are 75

and pupils in year 9 are 25

Step-by-step explanation:

as the circle divide fully by year 8 so 100 pupils remain there, now half circle divides into 2 part so. year 9 is 1/4 of whole and year 7 is 3/4 of whole