Here is the tree diagram to represent the sample space of spinning the spinner twice:
sp1 - Possible outcomes of the first spin:
Red, Blue, Green
sp1 - Red
sp2 - Red Red, Red
sp2 - Blue Red, Blue
sp2 - Green Red, Green
sp1 - Blue
sp2 - Red Blue, Red
sp2 - Blue Blue, Blue
sp2 - Green Blue, Green
sp1 - Green
sp2 - Red Green, Red
sp2 - Blue Green, Blue
sp2 - Green Green, Green
So the full sample space would be:
{(Red, Red), (Red, Blue), (Red, Green),
(Blue, Red), (Blue, Blue), (Blue, Green),
(Green, Red), (Green, Blue), (Green, Green)}
Does this capture the correct sample space for spinning the spinner twice? Let me know if you need any clarification.