# NCERT Class 7 Mathematics Solutions: Chapter 3 –Data Handling Exercise 3.3 Part 1

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1. Use the bar graph (fig 3.3) to answer the following questions:

(a) Which is the most popular pet?

(b) How many students have dog as a pet?

Answer:

(a) Cat is the most popular pet

(b) Students have dog as a pet.

2. Read the bar graph, which shows the number of books sold by a bookstore during five consecutive years and answer the following questions:

(i) About how many books were sold in ?

(ii) In which year were about books sold? About books sold?

(iii) In which years were fewer than books sold?

(iv) Can you explain how you would estimate the number of books sold in ?

Answer:

According to the bar graph

**(i)**

(a) In , books were sold.

(b) In , books were sold.

(c) In , books were sold.

**(ii)** In about books were sold and in about books were sold.

**(iii)** In and fewer than books were sold.

**(iv)** By reading the graph,

Number of book sold in a year 1989

(Here, 1cm 100 books)

So, 175 books were sold in.