How good is Yas Forums at maths/logic?

50%. Whether those balls are in one, three or six boxes it will still be 50%.

Correct.

There is only one ball left in the box you’ve chosen which is either green or red. If there are only 2 choices then that means 50/50. Midwit.

The double red box doesn't apply any longer because you've already ruled that one out by grabbing a green ball

Apparently an eternity in hell since gambling is a sin

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This is conditional probability problem. The probability is 50%. Because you are limited to boxes 1&2 already.

Ranma 1/2

this is correct
how can anyone not know this?