Question

percentages of marks of students and the number of students. Draw a frequency polygon from the table.

Result (Percentage)	30 - 40	40 - 50	50 - 60	60 - 70	70 - 80	80 - 90	90 - 100
No. of students	7	33	45	65	47	18	5

Answer 1

Class Result (%)	20 - 30	30 - 40	40 - 50	50 - 60	60 - 70	70 - 80	80 - 90	90 - 100	100 - 110
Class mark	25	35	45	55	65	75	85	95	105
Frequency (No. of students)	0	7	33	45	65	47	18	5	0
Co-ordinates of points	(25, 0)	(35, 7)	(45, 33)	(55, 45)	(65, 65)	(75, 47)	(85, 18)	(95, 5)	(105, 0)