What we already learned in class IX

What we already learned in previous class

What we already learned in previous classes

What we already learned in previous classes

What we already learned in previous chapters. What we are going to learn in this chapter?

What we learned in previous classes.

What we will learn

What we will learn in this Chapter

The following bar graph shows the number of students in different classes of a school. How many more students are there in Class IX than in Class VIII ?