Maximum number of batsmen are in the class 4000 – 5000.
∴ Modal class is 4000 – 5000.
Lower boundary of the modal class ‘l’ = 4000
Frequency of the modal class, f1 = 18
Frequency of the class preceding the modal class, f0 = 4
Frequency of the class succeeding the modal class, f2 = 9
Height of the class, h = 1000