Question

the amounts of water tax bills (in rupees) of 30 houses in a locality are given below:

Answer 1

That's easy.
Make 3 Columns.
1st column: classes
2nd: Tally marks
3rd:Frequency
Make classes: 1-100, 101-200, 201-300, respectively.
You must know Tally marks. 4 like |||| and 5 like a slash on them.