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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 (|); it is also called bars. Tally marks are always represented in
bunches of five. First four tally marks are drawn like |, ||, |||, |||| and fifth tally mark is

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

repeated twice, we put two bars (||); if an observation is repeated thrice, we put three
bars (|||); if an observation is repeated four times, we put four bars (||||); but if the

observation is repeated five times, we put four bars vertical and fifth bar diagonally ( ).

tally Chart

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

example: Let us consider the marks obtained (out of 20) in 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

250 Mathematics-5