NCERT Class 7 Mathematics Solutions: Chapter 3 – Data Handling Exercise 3.3 Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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1. Consider this data collected from a survey of a colony.

Different Types of Sports and Data Collected from a Survey of a Colony
Favorite SportCricketBasketballSwimmingHockeyAthletics
Watching
Participating

(i) Draw a double bar graph choosing an appropriate scale. What do you infer from the bar graph?

(ii) Which sport is most popular?

(iii) Which is more preferred, watching or participating in sports?

Answer:

Data represented by the double bar graph is as follows:

Given Data Represented by the Double Bar Graph

(i) This bar graph represents the number of persons who are watching and participating in their favourite sports.

(ii) Cricket is most popular.

(iii) Watching sports is more preferred.

2. Take the data giving the minimum and the maximum temperature of various cities given in the beginning of this Chapter. Plot a double bar graph using the data and answer the following:

Minimum and the Maximum Temperature of Various Cities Given in the Table
CityAhmedabadAmritsarBangaloreChennai
Max.

Min.

CityDelhiJaipurJammuMumbai
Max.

Min.

(i) Which city has the largest difference in the minimum and maximum temperature on the given data?

(ii) Which is the hottest city and which is the coldest city?

(iii) Name two cities where maximum temperature of one was less than the minimum temperature of the order.

(iv) Name the city, which has the least difference between its minimum and the maximum temperature.

Answer:

Data represented by double bar graph is as follows:

Double Bar Graph Using the Given Data

(i) Jammu has the largest difference in temperature i.e.. ,

Maximum temperature and

Minimum temperature

Difference

(ii) Jammu is the hottest city due to maximum temperature is high and Bangalore is the coldest city due to maximum temperature is low.

(iii) Maximum temperature of Bangalore is

Minimum temperature of two cities whose minimum temperature is higher than the maximum temperature of Bangalore are Ahmedabad and Jaipur where the minimum temperature is

(iv) Mumbai has the least difference in temperature i.e..

Maximum temperature and

Minimum temperature

Difference