Page 277 - ICSE Math 7

Self-Testing Exercise 6

DATA HANDLING

1. The number of children in each of the 20 families is given below. Represent this information
in the form of a frequency distribution.
2, 1, 3, 2, 2, 3, 1, 1, 4, 5, 1, 1, 2, 3, 2, 2, 2, 3, 4, 2

2. Find the mean of the first five odd prime numbers.

3. Arrange the following data as an array in descending order.
7.5, 6.4, 9.5, 8.3, 7.5, 6.6, 9.3, 4.3, 8.1, 6.6

4. The weight (in kg) of 15 students of a class are:
39, 42, 33, 45, 36, 47, 35, 44, 49, 40, 37, 39, 44, 39, 44

(a) Find the median weight (b) Find the value of mode

5. Study the given column graph and answer the following Y
questions.
40
(a) What information does the 35
column graph provide? 30

(b) Which subject is least liked by 25
students? Number of students 20
15
(c) Which subject is most liked by 10 Mathematics
students? 5 Hindi English Science
0 X
(d) How many students like English? Favourite subjects

6. The following table show the monthly consumption of sugar by a family. Represent the given
information with the help of a bar graph.

Month January February March April May

Consumption (in g) 600 500 800 300 400

7. A box contains 8 red marbles, 12 black marbles and 15 green marbles. One marble is drawn
from the box at random. find the probability of drawing a:
(a) green marble (b) black marble (c) marble that is not red

8. A die is thrown once. Find the probability of getting the following numbers on the die.
(a) even number (b) number less than 5

(c) number greater than 2 (d) prime number

263