Number of Classes = 4
Number of Students per class = 19
Thus, total number of students = 4 x 19 = 76
Each table can display highest of 6 projects, so we divide 76 (total number of projects since each student = 1 project) by 6 and get:
76 / 6 = 12 remainder 4
We need 12 tables + 1 table to display the remaining 4 projects.
That's a total of 12 + 1 = 13 tables
Correct Answer
B