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\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

For data to be meaningful and useful, the items of data must be gathered or captured and
recorded in a systematic manner.

Organising the Data in tabular fOrm Or tally Chart

When the raw data is arranged in a tabular form, the process is called organising data.

tally marks

Tally marks are vertical lines (|) they are also called bars. Tally marks are always represented
in bunches of five. The first four tally marks are drawn as |, ||, |||, |||| and the fifth tally

mark is drawn diagonally across the first four tally marks to make a group of five ( ).
For example, if an observation appears once, we put one bar (|); if an observation appears

twice, we put two bars (||); if an observation appears thrice, we put three bars (|||); if an
observation appears four times, we put four bars (||||); but if the observation is repeated
five times, we put four bars vertically and the fifth bar diagonally ( ).

tally Chart

A tally chart is a quick and easy way to count how many data items there are in each
category. We represent each item as a tally mark.

Example 1: Let us consider the marks scored (out of 20) in a Maths test by 30 students
of class V.

18 18 9 13 10 18 11 11 10 18
19 16 12 15 13 20 10 9 14 17
14 15 19 11 17 15 10 18 16 11

Let us prepare a tally chart for the above data.
Marks obtained (observation) Tally marks No. of students

9 || 2
10 |||| 4
11 |||| 4
12 | 1

13 || 2
14 || 2
15 ||| 3
16 || 2
17 || 2

18 5
19 || 2
20 | 1
Total 30

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