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\ 07-Nov-2024 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Chapter assessment
A. Choose the correct option.

1. Using tally marks, which one of the following represents the number eight:
(a) |||| ||| (b) (c) ||| (d) |||
2. The marks (out of 10) obtained by 28 students in a Mathematics tests are listed below:

8, 1, 2, 6, 5, 5, 5, 0, 1, 9, 7, 8, 0, 5, 8, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2, 0
The number of students who obtained marks more than or equal to 5 is
(a) 13 (b) 15 (c) 16 (d) 17
3. In question 2 above, the number of students who scored marks less than 4 is
(a) 15 (b) 13 (c) 12 (d) 10

4. In a pictograph, if a symbol represents 20 flowers in a basket, then the symbol stands
for .......... flowers.
(a) 15 (b) 40 (c) 60 (d) 45

5. In a pictograph, if a symbol represents 30 shells, then which of the following will represent a
collection of 105 shells?

(a) (b)
(c) (d)

B. Fill in the blanks.
1. Data obtained in its original form is called .................... data.
2. The number of times a particular observation occurs in a data is called .................... of the observation.
3. An observation occurring 9 times in a data is represented as .................... using tally marks.

4. Arranging the data in the form of table using tally marks is called .................... .
5. A representation of data using pictures or symbols of objects is called a .................... .
C. State whether the following statements are True (T) or False (F).
1. Pictographs and bar graphs are pictorial representations of the numerical data.
2. In a bar graph, bars of uniform width are drawn vertically only.

3. An observation occurring five times in a data is recorded as |||||, using tally marks.
4. In a bar graph, each bar represents only one value of the numerical data.
5. To represent the population of different towns using a bar graph, it is convenient to take one unit
length to represent one person.
D. Solve the following questions.
1. The following data shows the marks obtained by 30 students in a unit test:
20, 25, 30, 24, 30, 25, 20, 19, 15, 10, 24, 25, 30, 24, 19, 30, 25, 15, 20, 24, 25, 30, 19, 19, 25, 24, 30, 19,
24, 20.
Write the above data in a tabular form using tally marks and answer the following questions:
(a) Find the number of students who scored marks more than 25.

(b) If passing marks is 20, then how many students passed the test?
(c) How many students scored marks between 15 and 30?

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