Important Questions for Class 8 Chapter 5-Data Handling

Students, you may need to practice a lot while preparing for CBSE Final exams and other exams. However, how do you decide on the questions or topics to prepare for? For your benefit, our math subject experts have meticulously prepared a list of important questions for CBSE class 8 Math chapter-wise and topic-wise.

Important questions based on NCERT syllabus for Class 7 Class 8 Chapter 5 - Data Handling:

Question 1: The graph depicts the percentage of men and women suffering from a migraine in various age groups.
a) In which age group, there is a huge difference between the percentage of men and women?
b) In which age group, the percentage of women is the least?
c) What is the percentage of women in the age group of 18-44?
Graph
Solution:
a) In the age group 18 - 44, there is maximum difference between the bars of men and women. So the difference (the percentage of women - the percentage of men) is 15.
b) In the age group >75, the percentage of women is the least of all.
c) The percentage of women in the age group 18 - 44 is 25.

Question 2: From the above pie chart find out: a) The fraction of students interested in science. b) The fraction of students interested in social studies and maths.
Graph-2
Solution:
The total number of students is 100.
a) Fraction of students interested in science =13100
b) Fraction of students interested in social science and maths =14+15/100 = 29/100

Question 3:Table
A group of 360 people were asked to vote for their favourite season from the three seasons: rainy, winter and summer. Find the central angle of each sector in a pie chart for the above information.
Solution:
Central Angle can be calculated as follows:
Season′s Number of Votes / Total Votes × 360o
Summer's Central Angle = 90/360 × 360o = 90o
Rainy's Central Angle = 120/360 × 360o = 120o
Winter's Central Angle = 150/360 × 360o = 150o