What is the difference between number of students who participate in Drama from class 7th and 8th to...........

Quantitative Aptitude (Insurance) Data Table

Directions : Study the table carefully and answer the following questions. Table given below shows the total number of students in five different classes in which some students take part in drama & some in painting & some students do not take part in any event.

What is the difference between number of students who participate in Drama from class 7th and 8th together and number of students who participate in painting from class 9th and 10th together ?