Q61Written answer
Sum of all the central angles in a pie chart is 360°.
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Solution:-
True.
NCERT Exemplar · Class 8 · Maths
Chapter 2: Data Handling
Practice each question, then open the answer or worked solution.
Some questions are missing from the current source. Exercise · Page 42: questions 88 missing from source
Exercise · Page 42
Textbook page 42 · 115 questionsQ62Written answer
In a pie chart two central angles can be of 180o.
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Worked solution
Solution:-
True.
We know that sum of all the central angles in a pie chart is 360o. So, if two angles have 180o each then the sum of two angles is 360o.
Q63Written answer
In a pie chart two or more central angles can be equal.
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Solution:-
True.
Yes, in a pie chart two or more central angles can be equal.
Q64Written answer
Getting a prime number on throwing a die is an event.
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Solution:-
True.
Each outcome or a collection of outcomes in an experiment makes an Event.
Q65Written answer
9 students got full marks.
Using the following frequency table, answer questions 65-68
| Marks (obtained out of 10) | 4 | 5 | 7 | 8 | 9 | 10 |
| Frequency | 5 | 10 | 8 | 6 | 12 | 9 |
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Solution:-
True.
From the table, given that 9 students got 10 out of 10 marks.
Q66Written answer
The frequency of less than 8 marks is 29.
Using the following frequency table, answer questions 65-68
| Marks (obtained out of 10) | 4 | 5 | 7 | 8 | 9 | 10 |
| Frequency | 5 | 10 | 8 | 6 | 12 | 9 |
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Worked solution
Solution:-
False.
The frequency of less than 8 marks is 8 + 10 + 5 = 23 students.
Q67Written answer
The frequency of more than 8 marks is 21.
Using the following frequency table, answer questions 65-68
| Marks (obtained out of 10) | 4 | 5 | 7 | 8 | 9 | 10 |
| Frequency | 5 | 10 | 8 | 6 | 12 | 9 |
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Worked solution
Solution:-
True.
The frequency of more than 8 marks is 12 + 9 = 21 students.
Q68Written answer
10 marks the highest frequency.
Using the following frequency table, answer questions 65-68
| Marks (obtained out of 10) | 4 | 5 | 7 | 8 | 9 | 10 |
| Frequency | 5 | 10 | 8 | 6 | 12 | 9 |
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Worked solution
Solution:-
False.
9 marks has highest frequency, i.e. 12. But, 10 has 9 frequency.
Q69Written answer
If the fifth class interval is 60 – 65, fourth class interval is 55 – 60, then the first class interval is 45 –50.
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Solution:-
False.
The first class interval is 40 – 45, second class interval is 45 – 50, third class interval is
50 – 55, fourth class interval 55 – 60, fifth class interval is 60 – 65.
Q70Written answer
From the histogram given on the right, we
can say that 1500 males above the age of 20 are
literate.
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Worked solution
Solution:-
False.
From the histogram given on the right, we
can say that 1900 (600 + 800 + 500) males above the age of 20 are
literate.