If 97% of students are present in a class and 12 students are absent, find the total number of students in the class.

Correct option is A

Let the total number of students be X.
If 97% are present, 3% are absent:
3% of X=12
3 / 100 × �� = 12
�� = 12 × 100 / 3 = 400
Thus, the correct answer is 400.