Monday: 25 students absent

Tuesday: 20 students absent

Wednesday: 10 students absent

Thursday: 15 students absent

Friday: 20 students absent

Of the given above absences, 8 students were absent exactly 2 days each, 1 was absent 3 days, and no students were absent more than 3 days. If 5 percent of the students in the school were absent at least 1 day last week, how many students are enrolled in this school?

How can it be 1600??