Answer:
9 students.
Explanation:
Assuming you meant 3/8 & 1/4
3/8 students are eating a salad and 1/4 are eating a sandwich
Add these two fractions to get 5/8
(3/8 + 1/4 -> 3/8 + 2/8 = 5/8)
This means that 5/8 of the students are eating one of the above options & 3/8 are not eating these options
Then we need to find 3/8 of 24
1/8 of 24 = 3
3 x 3 = 9