SSC GD Constable 16 Nov 2021 Shift 1 Paper

The number of students in class IX and class X is 42 and 45, respectively. The ratio of the number of boys to girls in classes is IX and X is 9 ∶ 5 and 8 ∶ 7, respectively. What is the difference between the total number of boys and the total number of girls in both the classes taken together?