Answer:
The number of students who can sit at 10 groups of tables are:
 320 students.
Explanation:
It is given that:
In the cafeteria, tables are arranged in groups of 4, with each table seating 8 students.
- This means that the number of students who could seat in one group of table are: 
Number of student seating in one table×Number of table in one group
 = 8×4
 =32 students
Now, we are asked to find the number of students who can sit at 10 groups of tables.
- Number of students who can sit at 10 groups of tables=Number of students sitting in one group of table×10
 i.e.
Number of students who can sit at 10 groups of tables=32×10
 i.e.
Number of students who can sit at 10 groups of tables=320 students.