Answer:
3:21
(1:7 if simplified)
Step-by-step explanation:
Hi there!
We're given that out of 24 boxes, 3 of them have prizes.
24-3 = 21
Therefore, 21 out of the 24 boxes have no prizes.
The ratio of boxes with prizes to boxes with no prizes is:
3:21
(Or 1:7 if simplified.)
I hope this helps!