Page 106 - Ganit Kaushal

Now, to put the given raw data in tabular form, we make three columns in a table. Put all the possible values
like 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 of the variable (marks) in the first column, tally-marks in the second column and
the number of students (frequency) in the third column as shown in the table below.

Marks (Variable) Tally marks Number of students (Frequency)
0 | 1
1 || 2
2 |||| 4
3 ||| 3
4 |||| 4

5 ||| 3
6 |||| 4
7 ||| 3
8 | 1
9 |||| 5
Total 30
The given raw data has been put in an organised manner in the above table with the help of tally marks, which is
easily understandable, and you can answer any question associated with the data. Here are a few. Try answering
them and discuss with your classmates and teacher.
How many students have got the maximum marks?
How many students have got the minimum marks?
How many students passed the exam if a minimum of 4 marks is required to pass the exam?
How many students failed the exam?

Solved Examples

Ex 1. Nilesh wanted to bring sweets for his friends to celebrate the new year. He asked the preferences of
his friends and prepared the following tally marks table, in which a few entries are missing. (NCERT)

Sweets Tally marks No. of students
Jalebi |||| | 6
Gulab Jamun |||| |||| 9
Gujiya |||| |||| ||| ______________
Barfi ||| ______________
Rasgulla |||| || ______________

(a) Complete the table to help Nilesh purchase the correct number of sweets.
(b) How many students choose Jalebi?
(c) Barfi was chosen by students.
(d) How many students choose Gujiya?

(e) Rasgulla was chosen by students.
(f) How many students choose Gulab Jamun?
Sol. (a) The tally marks for Gujiya is ||| that represents 13 students. The tally marks for Barfi is ||| that
represents 3 students. The tally marks for Rasgulla is || that represents 7 students.

104 Mathematics-6