The school that dave goes to has 180 pupils in year 9 how many pupils are there in year 7 and 8 if year 7 is 110 degrees and year 8 is 130 degrees on a pie chart.
+118724 The school that dave goes to has 180 pupils in year 9 how many pupils are there in year 7 and 8 if year 7 is 110 degrees and year 8 is 130 degrees on a pie chart.
ok lets think about this.
there is 360 degrees in a circle
yr7 is 110 degrees
yr 8 is 130 degrees
that makes 240 degrees for 7 and 8 combined
360-240=120 so year 9 is 120 degrees out of a total of 360 degrees
let x be the entire school population
(120/360) of x = 180 students
(1/3)x=180
x=180*3 = 540 students
yr 7 is 110/360 * 540 = 165 students
and you can figure out year 8 on your own. do it just like i did year 7 
+118724 The school that dave goes to has 180 pupils in year 9 how many pupils are there in year 7 and 8 if year 7 is 110 degrees and year 8 is 130 degrees on a pie chart.
ok lets think about this.
there is 360 degrees in a circle
yr7 is 110 degrees
yr 8 is 130 degrees
that makes 240 degrees for 7 and 8 combined
360-240=120 so year 9 is 120 degrees out of a total of 360 degrees
let x be the entire school population
(120/360) of x = 180 students
(1/3)x=180
x=180*3 = 540 students
yr 7 is 110/360 * 540 = 165 students
and you can figure out year 8 on your own. do it just like i did year 7
