84643_VI - 62_222310042-VISA-STUDENT-TEXTBOOK-MATHEMATICS-G05-PART2_CompressPdf

Draw a circle graph from the tally marks table and answer these questions: a) Which profession is aspired by the maximum number of students? b) W hich profession is aspired by the least number of students? c) How many students want to become businessmen? d) H ow many students want to become a scientist? e) H ow many students are there in the class altogether? Solution: Aspirations of students of a class Profession Tally marks Number of Fraction of students students Doctor 8 8 = 4 = 25 % Engineer 32 16 Scientist Businessman 12 12 =6 = 37.50 % 32 16 6 6 = 3 = 18.75 % 32 16 4 42 32 = 16 = 12.50 % CA 2 2 = 1 = 6.25 % 32 16 We divide a circle into 16 parts and represent these as fractions of the total number of students. a) Engineer b) CA c) 4 students d) 6 students e) 32 students are there in the class. Data Handling 97

Aspiration of Students of a Class 6.25% Businessman CA 12.50% Scientist Doctor 18.75% 25% Engineer 37.50 Maths Munchies 213 The angle in a pie chart can tell us about the data shown. When the angle in the pie chart is 90º that means the data shown is quarter of the total. When the angle in the pie chart is 180º, that means the data shown is half of the total. Connect the Dots Science Fun Healthy Diet A healthy diet should consist of: Heafaltthsy 15% Proteins 25% Carbohydrates 30% Proteins 25% Vegetables 30% Vegetables 30% Healthy fats 15% Carbo3h0y%drates 98

Social Studies Fun In 2011, the estimated population of India was 1.2 billion. This made India the country with the second highest population, after the People’s Republic of China. India’s area is 2.4% of the world’s land surface. 17.5% of the world’s population lives here. Drill Time Concept 14.1: Circle Graphs Solve the following: a) Draw the circle graph based on the following data. Pets owned by people Percentage of people Dog 30% Cat 15% Fish 20% 10% Rabbit 25% Parrot b) Raghu spends his day as given in the table here. At school 8 hours Playing 2 hours Doing homework 2 hours Reading 1 hour Routine work 3 hours Sleeping 8 hours Draw a circle graph and colour the groups with different colours. (Hint: Divide the circle into 24 equal parts as 24 hours = 1 day) Data Handling 99

Drill Time c) T he data shows the students with their favourite sports. Draw a circle graph based on the data. Favourite sport Percentage of students Football 25% Cricket 50% 25% Basketball A Note to Parent Ask your child to count the number of plants in your locality. Categorise them into trees, herbs and shrubs using a table of tally marks. Then draw a circle graph for the same. Create other such opportunities for your child to practice data handing. 100