Answer :
N - number of students in one class
70 - number of absent students
absent in each of the classes:
5 x 1/2N - 5 classes were half full,
3 x 1/4N - 3 classes were 3/4 full
2 x 1/8N - 2 classes were 1/8 empty
(5 x 1/2N) + (3 x 1/4N) + (2 x 1/8N) = 70
N = ?
How many students are in this school when no students are absent?
10 x N
70 - number of absent students
absent in each of the classes:
5 x 1/2N - 5 classes were half full,
3 x 1/4N - 3 classes were 3/4 full
2 x 1/8N - 2 classes were 1/8 empty
(5 x 1/2N) + (3 x 1/4N) + (2 x 1/8N) = 70
N = ?
How many students are in this school when no students are absent?
10 x N