Answer:
Please see attached
Step-by-step explanation:
The answer to this would be C because you can multiply everything by 3 and still have a consistent-dependent system.
If there are 8 marbles in a group , and 5 out of every 8 is red, than in six groups there would be 5, 10, 15, 20, 25, 30 red marbles.
This lists the group of 6 sets.
30 red marbles in 6 sets.