R d sharma solutions mathematics class 9 Solutions for Chapter 23 graphical representation of statistical data

Exercises in Chapter 23 graphical representation of statistical data Grade 9

Graphical Representation Of Statistical Data Exercise 23.1

Graphical Representation Of Statistical Data Exercise 23.2

Graphical Representation Of Statistical Data Exercise 23.3

Questions in Graphical Representation Of Statistical Data Exercise 23.1

The following table shows the number of Maruti cars sold by five dealers in a particular month:

dealer	saya	bagga links	d.d motors	bhasin motors	competent
cars sold	60	40	20	15	10

Represent the above information by a pictograph.

The population of Delhi State in different census years is as given below:

census year	1961	1971	1981	1991	2001
population in lakhs	30	55	70	110	150

Represent the above information with the help of a bar graph.

Questions in Graphical Representation Of Statistical Data Exercise 23.2

Explain the reading and interpretation of bar graphs.

The following bar graph shows the results of an annual examination in a secondary school. Read the bar graph given below, and choose the correct alternative in each of the following:

(i)The pair of classes in which the results of boys and girls are inversely proportional are:

(a) VI, VIII

(b) VI, IX

(d) VIII, X

(ii) The class having the lowest failure rate of girls is:

(a) VI

(b) X

(d) VIII

(iii) The class having the lowest pass rate of students is:

(a) VI

(b) VII

(d) IX

The following data gives the number (in thousands) of applicants registered with an

Employment Exchange during 1995-2000:

year	1995	1996	1997	1998	1999	2000
number of applications registered (in thousands)	18	20	24	28	30	34

Construct a bar graph to represent the above data.

Questions in Graphical Representation Of Statistical Data Exercise 23.3

Construct a histogram for the following data:

monthly schoool fee(in rs.)	30-60	60-90	90-120	120-150	150-180	180-210	210-240
no. of schools	5	12	14	18	10	9	4

Draw, in the same diagram, a histogram and a frequency polygon to represent the following data which shows the monthly cost of living index of a city in a period of 2 years: