Samacheer Kalvi Class 4 Maths Solutions Term 1 Chapter 6 Information Processing Exercise 6.3

Question 1. Write down the percentage of content in human body from the given pie-chart.
Answer: The human body's content percentages, as shown in the pie-chart, are 60% Water, 24% Protein, and 16% Other substances. Water is the largest component, playing a vital role in many bodily functions.
In simple words: Your body is made up of 60% water, 24% protein, and 16% other parts.

🎯 Exam Tip: When presenting data from a pie chart, clearly list each category with its corresponding percentage or value for full clarity.

Question 2. The number of varieties of ice creams in an ice cream parlour is given below as a pie-chart. Answer the following questions.
(i) How many varieties of Ice creams are there -
(ii) Find the number of Vaniki Ice creams -
(iii) Find the total number of Chocolate and Pista Ice cream -
(iv) Find the total number of Ice creams -
Answer:
(i) There are three distinct varieties of ice creams available in the parlour, namely Pista, Vanilla, and Chocolate. Each type offers a unique flavor for customers.
(ii) There are 50 servings of Vaniki (Vanilla) Ice cream available in the parlour. Vanilla is a widely enjoyed classic flavor.
(iii) The total number of Chocolate and Pista Ice cream servings combined is 50. This is calculated by adding 30 Pista ice creams to 20 Chocolate ice creams.
(iv) The total number of all ice creams available in the parlour is 100. This sum includes Pista (30), Vanilla (50), and Chocolate (20) servings.
In simple words:
(i) There are three types of ice cream: Pista, Vanilla, and Chocolate.
(ii) There are 50 Vanilla ice creams.
(iii) Chocolate (20) and Pista (30) ice creams together make 50.
(iv) All the ice creams together (30 + 50 + 20) make a total of 100.

🎯 Exam Tip: Always clearly identify the information from the pie chart for each sub-question. When calculating totals, ensure all relevant numbers are added correctly.

Question 3. Absentees record of a class of 30 children is given in a graph.
(i) In which month there are more absentees?
(ii) In which month there are less absentees?
Answer:
(i) More absentees were recorded during the months of October to December. This period often corresponds to the winter season, when children are more susceptible to illnesses.
(ii) Fewer absentees were recorded from January to March. This decrease in absences could be attributed to the approaching annual exams, encouraging higher attendance.
In simple words:
(i) Most students were absent from October to December because it is winter.
(ii) Fewest students were absent from January to March because annual exams are near.

🎯 Exam Tip: To find "more" or "less" on a bar graph, look for the tallest or shortest bar respectively. Always provide a logical reason if the question asks for it.

Question 4. Draw a pie-chart for the favourite sweets of your family members.
Answer: A pie-chart illustrating the favorite sweets among family members would show Peda as the most preferred, accounting for 50%. Boondi would represent 30%, while Jalebi and Halwa would each account for 10% of the preferences. This chart effectively visualizes the proportional popularity of each sweet.
In simple words: A pie chart for family sweets would show Peda (50%) as the most liked, then Boondi (30%), and then Jalebi (10%) and Halwa (10%).

🎯 Exam Tip: When creating a pie chart, ensure that all percentages add up to 100% and that the size of each sector accurately reflects its proportion of the total.

Question 5. Collect information about the favourite pets of your classmates. Drow bar-graph and pie-chart for the same data.
Answer: After collecting data on classmates' favorite pets, it was found that 60% prefer dogs, 30% prefer cats, and 10% prefer birds. This information can be effectively represented using both a bar graph and a pie chart. A bar graph would display the number of students who prefer each pet, while a pie chart would show the percentage distribution, clearly indicating dogs as the most popular choice. The data shows: Dogs 60%, Cats 30%, Birds 10%.
In simple words: A survey showed that 60% of classmates like dogs, 30% like cats, and 10% like birds. This data can be shown using a bar graph and a pie chart.

🎯 Exam Tip: For data representation questions, clearly label all axes on a bar graph and ensure all categories and percentages are visible on a pie chart to convey information accurately.