The marks scored by 40 students of class VIII in mathematics are given below :

81, 55, 68, 79, 85, 43, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54.


Prepare a frequency distribution with class size of 10 marks.


Marks



Frequency Distribution



20 – 30



1



30 – 40



3



40 – 50



6



50 – 60



7



60 – 70



9



70 – 80



8



80 – 90



34



90 – 100



2




6