Total number of students = 50
Number of students absent = 110 of total students
= 110 × 50 = 5
Student involed in project = 15 of total students
= 15 × 50 = 10
Number of students present = Total number of students − (students absent + students involved in school project)
= 50 − (5 + 10) = 35
Thus, out of 50 students, 35 students are present in the class.