Page 124 - Ganit Kaushal

(g) An observation occurring five times in a data set is recorded as i.e., by cutting the first four tally
marks horizontally or diagonally. So the given statement is false.
(h) True
Subjective/Competency Based Questions
Ex 8. The number of two-wheelers owned individually by each of 50 families is listed below. Make a table
using tally marks.
1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 0, 1, 1, 2, 3, 1, 2, 1, 1, 2, 1, 2, 3, 1, 0, 2, 1, 0, 2, 1, 2, 1, 2, 1, 1, 4, 1, 3, 1, 1, 2,
1, 1, 1, 1, 2, 3, 2, 1, 1.
Find the number of families having two or more two-wheelers.
Sol. Number of two wheelers Tally marks Number of families
0 ||| 3
1 |||| |||| |||| |||| |||| ||| 28
2 |||| |||| |||| 14
3 |||| 4
4 | 1
From the table, we see that the number of families having two or more two-wheelers = 14 + 4 + 1 = 19
Ex 9. Students of class VI in a school were given a task to count the number of articles made of different
materials in the school. The data collected by them is given in the following pictograph.
Observe the pictograph and answer the following questions. Material Articles
(a) Which material is used in the maximum number of articles? used (1 = 20 Articles)
(b) Which material is used in the minimum number of articles? Wood
(c) Which material is used in exactly half the number of articles Glass
as those made up of metal?
(d) What is the total number of articles counted by the students? Metal
Sol. (a) Metal is used in the maximum number of articles. Rubber
(b) Glass is used in the minimum number of articles. Plastic
(c) Rubber is used in exactly half the number of articles as those made up of metal.
(d) = 20 articles, = 10 articles, = 5 articles
\ Total number of articles counted by the students = 30 + 20 + 50 + 25 + 35 = 160
Ex 10. Observe this bar graph, which shows the marks
obtained by Atul in the half-yearly examination
in different subjects, and answer the following
questions:
(a) What information does the bar graph give?
(b) Name the subject in which Atul scored the
maximum marks.
(c) Name the subject in which he has scored the
minimum marks.
(d) State the names of the subjects and marks
obtained in each of them.
Sol. (a) The bar graph shows the marks obtained by
Atul in different subjects.
(b) Atul scored the maximum marks in Hindi.

122 Mathematics-6