I need help with this probability problem. I’m helping my brother with his homework and I don’t know how to solve this question. He is in 7th grade math.

Hello from MrBillDoesMath!
Answer:
Number marbles >= 5
Discussion:
The only certain thing we can say is the jar contains at least 5 (green) marbles. The table shows probabilities, not certainties, and is no guarantee that any other marbles even exist in the jar,
Thank you,
MrB