The total number of students who voted is the sum of the number of votes for each fruit. This is 5+3+2+4+1+4=19.

A bar graph is a chart that presents data with rectangular bars for different categories. The bars have lengths proportional to the values that they represent. 

From the given line graph, we have:
The runs scored by batsman ${}^{\prime }{3}^{\prime }=10$

The runs scored by batsman  ${}^{\prime }{5}^{\prime }=50$
$\therefore$ required difference in scores $=(50-10)=40$

A histogram is a representation of continuous data that are grouped into classes. There are no gaps between the bars in a histogram because the classes are continuous.

A line graph can be used to display data that changes continuously over a period of time.

From the graph, it can be observed that number of students who like oranges and mangoes is 4.
In this case, lengths of bars corresponding to mangoes and oranges are same.

From pie chart, we can see that the content of carbon dioxide is 25% which is equal to 500 ppm.

So, total gas present in the atmosphere = $\frac{500\times 100}{25}$ = 2000 ppm

Oxygen content is 15% = $\frac{2000\times 15}{100}$ = 300 ppm.

For point A, X-coordinate= 2 Y-coordinate=3

For point B , X-coordinate = 3 Y-coordinate=2

Hence, they will not coincide. 

Representation of data in form of sectors of a circle is called pie chart.

Perimeter of the square =4a (where a is length of side)

Length of side of square = 2 cm

Perimeter of the square = 4 × 2= 8 cm