The following table shows the modes of transport used by boys and girls for going to the same school.

Draw a double bar graph representing the above data.

The number of times a data, in the set, occurs is called :

1. upper-limit

2. class-mark

3. frequency

4. class-limit

The difference between the upper and lower class-limits of a class-interval is called :

1. width of the class-interval

2. frequency

3. class-limit

4. class-mark

In a bar-graph, if the widths of all the bars are kept same, their heights are proportional to their :

1. class-size

2. class-mark

3. class-limits

4. frequency