Answer:
12 students
Step-by-step explanation:
Given
[tex]Students = 54[/tex]
Required
Determine the number of students that eat lunch once a week
In Sets;
If out of 9, at least 7 eats one a week then
9 - 7 eats lunch once a week
[tex]9 - 7 = 2[/tex]
In other words;
2 out of 9 students eat lunch once a week
Number of students in this category is then calculated as thus;
[tex]Number = \frac{2}{9} * 54[/tex]
[tex]Number = \frac{2 * 54}{9}[/tex]
[tex]Number = \frac{108}{9}[/tex]
[tex]Number = 12[/tex]
