Question

The bar graph shows the number of gold medals won by the four countries with the most gold medals in 2000 Olympic Summer games. How many gold medals did the four countries win in all (p.757)

Short answer

The total number of the medals won by four countries is 115.

Step-by-step solution

Step-1 – What is a bar graph

A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights.

A bar graph can be defined as a chart or a graphical representation of data, quantities or numbers using bars or strips. Bar graphs are used to compare and contrast numbers, frequencies or other measures of distinct categories of data.

Step-2 – Example of a bar graph 

Imagine you just did a survey of your friends to find which kind of movie they liked best:

We can show that on a bar graph like this:

It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

We can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many customers a shop has on different days and so on.

Step-3 – Find the total number of gold medals did the four countries win in all.

Given information:

Consider, the information provided in the question,

Australia- 16; China- 28; Russia- 32; United states- 39

To find the total number of gold medals won by the four countries, we need to add the gold medals of all the respective medals won by each countries,

Therefore, the sum is obtained as: $16+28+32+39=115$

The total number of the medals won by four countries is 115.