Question

a recent survey determained that 7 out of 9 students eat school lunch at least once a week. if 54 students were surveyed how many eat school lunch once a week?

Answer 1

12 students

Explanation:

Given

`Students = 54`

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

`9 - 7 = 2`

In other words;

2 out of 9 students eat lunch once a week

Number of students in this category is then calculated as thus;

`Number = (2)/(9) * 54`

`Number = (2 * 54)/(9)`

`Number = (108)/(9)`

`Number = 12`