CBSE Class 8 Mathematics Data Handling Assignment Set A

Question. The following bar graph shows the result of class XII of a school.

Answer the following questions :
(i) In which year the increase in the result was maximum? In which year the result of Class XII falls?
(ii) Can we say that the school’s result is improving in all the years?
Answer : (i) In year 2005–06, In year 2006–07 (ii) No.

Question. Read the following histogram and answer the question.

(i) What is the number of students in the marks group of 50–60?
(ii) In which group the number of students are maximum?
(iii) In which two groups the number of students are the same?
Answer : (i) 5 (ii) 60 – 70 (iii) 50–60 and 70–80

Question. The following histogram shows the weekly wages (in Rs.) of workers in a factory

(i) In which wage group are the largest number of workers being kept? What is their numbers?
(ii) What is the amount which is received by the least number of workers?
Answer : (i) 1000 – 1050, 10 (ii) 1050–1100

Question. Two unbiased coins are tossed simultaneously. Find the probability of getting no head.
Answer : 1/4

Question. The following histogram shows the height of 42 students in the class.

From the above histogram answer the following questions :
(i) How many students are having height less than 155 cm?
(ii) How many students have height equal to 160 or more?
(iii) How many students having height less than 170 cm?
Answer : (i) 12 (ii) 14 (iii) 42

Question. The following bar graph shows the population of a country in various census (in crores). In which year there was maximum and minimum population?

Answer : Maximum = 2001, Minimum – 1961

Question. A letter of English alphabet is chosen at random. Find the probability that the letter chosen is a vowel.
Answer : 5/26

Question. The following pie chart depicts the percentage of students nationwise in a school. What is the percentage of Indian students nationwise?

Answer : 50%

Question. In a family of two children. Find the probability of at least one girl child.
Answer : 3/4

Question. The following pie chart depicts the marks scored in an examination by a student in different subjects.

If the total marks obtained is 540. Which is greater?
(i) Sum of marks obtained in Maths and Science?
                               Or
(ii) Sum of marks obtained in S.St. and Hindi?
Answer : (i)

Question. A coin is tossed twice. Find the probability of getting both tails?
Answer : 1/4

Question. The following pie chart represents the number of valid votes obtained by four candidates who contested an election for the post of chairman. The total number of valid votes polled was 720. What are the number of votes polled by the winning candidate?

Answer : 240

Question. A box contains 19 cards having numbers 1, 2, 3, .... 19. A card is drawn from the box. What is the probability that the number on the card is divisible by 5.
Answer : 3/19

Question. The following pie chart shows the sources of earning by a transport company.

What is the major source of earning of the transport company
Answer : Passenger

Question. In the word “EDUCATION” find the probability of getting a vowel.
Answer : 5/9

Question. The following pie chart depicts the expenditure on different items at the time of construction of a flat.

What is the difference of expenditure on timber and bricks if the total cost of construction is Rs. 81,000?
Answer : Rs. 9000

Question. A card is drawn from a pack of 52 cards. Find the probability of drawing a red face card.
Answer : 3/26

Question. A card is drawn from a well shuffled pack of 52 cards. Find the probability that the card drawn is a black king.

Answer : 1/26

For Q. No. A to Q. No. D refer the following histogram depicting the marks obtained by 45 students of a class in Maths test.

Question. A. How many students obtained 20 or more marks but less than 35?
Answer : 26

Question. B. How many students got less than 15 marks?
Answer : 8

Question. C. If a first division is equal to 25 or more marks, how many students obtained this division?
Answer : 23

Question. D. In which class-interval of marks the no. of students were maximum?
Answer : 25–30

For Q. No. A to C refer the above pie chart which shows the monthly expenditure of a family. The family spends Rs. 3,600 per month on education.

Question. A. What is the total monthly expenditure of the family?
Answer : Rs. 21,600

Question. B. How much they spend on food per month?
Answer : Rs. 9,600

Question. C. In comparison of education how much more money was spend by the family on rent?
Answer : Rs. 600

Data Handling

Q 1 Define raw data.

Q 2 Define frequency.

Q 3 Define width or size of the class interval.

Q 4 Define upper class limit and lower class limit.

Q 5 What is a circle graph or pie chart?

Q 6 Define an event.

Q 7 What is the probability of an event?

Q 8 In an experiment of tossing a coin once, what is the probability of getting a head?

Q 9 If a die marked with 1, 2, 3, 4, 5, 6 on its faces is thrown, what is the probability of getting the number 3?

Q 10

Click on link below to download CBSE Class 8 Mathematics Data Handling Assignment Set A