Question

The marks obtained by 30 students of Class IX in an examination are as follows. Prepare a frequency table of 5 classes of class size 10. 19, 27, 40, 3, 33, 41, 18, 8, 20, 0, 23, 49, 16, 36, 14, 39, 6, 12, 29, 28, 22, 24, 37, 10, 23, 38, 35, 9, 49, 23

Answer 1

Maximum marks = 49; 

Minimum marks = 0 

Range = Maximum marks – Minimum marks 

= 49 – 0 = 49 

Class interval (size) = 10 

Number of intervals = 49/10

= 4.9 = 5