CBSE Class 8 Mathematics Data Handling Worksheet Set B

DATA HANDLING

1. The marks obtained 40 students of a class in an examination are given below; Prepare a frequency distribution table with class intervals starting from 0 - 10
8,47,22,31,17,13,38,26,3,34,29,11,22,7,15,24,38,31,21,35,42,42,24,45,23, 21,27,29,49,25,48,21,15,18,27,19,45,14,34,37,34.

2. The electricity bills ( in rupees ) of 25 houses of a certain locality for a month are given forma frequency table starting from 300 – 400.
324,700,617,400,356,365,435,506,548,736,780,378,570,685,312,630,584, 674,754,776,596,745,565,763,472.

3. The number of cycles produced in a factory during five consecutive weeks. Is given below draw a bar graph representing the above information

4. A survey showed that the average daily expenditure ( in Rs ) of 24 household of a city were 215,248,225,210,237,227,240,238,215,214,249,236,244,221,219,232,216,242,220,230,238,228,225,211.
Prepare frequency table using class intervals 210- 215 and so on also draw a histogram for the above data 0

5. The following is the frequency distribution of marks obtained by 45 Ina class test draw a histogram and answer the questions

1. What is the size of the class (2) what percentage of students scored marks
Greater than 60 but less than 70 (3) how many get 60 or more marks?

6. A letter is chosen at random from a given word. Find the probability that
The letter is vowel if the word is NATURAL.

7. Prime numbers between 1 and 25 are written on identical slips, put in a box and mixed well. If a slip is drawn at random, what is the probability of getting?
(a) One digit number (b) an even number (c) an odd number (d) no: greater than 11

8. A bag contains 10 white balls and 7 green balls. They are mixed thoroughly And one ball is drawn at random. Find the probability of getting the following
(a) A white ball (b) A green ball
(b) 10

9. A dice is thrown once. Find the probability of getting these outcomes
(i) A prime number (ii) Not a prime number (iii) A multiple of 3

10. Two coins are tossed simultaneously. Find the probability of getting
(i) 2 heads (ii) one head (III) no head (iv) at least one head (v) at most one head

11. What is the probability that a number selected from the numbers 1,2,3,4,……20 is not a multiple of 3?

12. One card is drawn from a well shuffled deck of 52 cards. Find the probability
that the card drawn is of the following type. (a) A diamond (b) An Ace