Answer:
A. 395.
B. 55.
Explanation:
A. We have been given that a survey found that 79% of the students agreed that fast food should be introduced.
To find the number of students, who want fast food served at the school cafeteria, we need to find 79% of 500.



Therefore, 395 students of the 500 students want fast food served at the school cafeteria.
B. To find the students have no view on this matter, we will find 11% of 500 as 100%-(79%+10%)=11%.



Therefore, 55 students have no view on this matter.