% out of 7 were the old tribe, so it was more like 2/3.
The other tribe is inept. On the immunity challenge they had 3 panels up before rice tribe started and couldn't finish first? Come on, with only 5 panels left that is only 10 possible choices and really only 8 because you should know the last piece. He couldn't eye it real quickly?
Merge will happen soon and at that point you will have a better chance if you are not a pair.