Originally Posted by a2a3dseddie View Post
When you fix the green die as a 2, the red die is 1/6. I agree.
When you fix the red die as a 2, the green die is 1/6. I agree.

Because either die (or both) could start out as the 2 (since you are rolling them at the same time and only counting rolls that contain at least one 2) any of the 11 two dice combinations that contain at least one 2 could be under the cup.
You just contradicted yourself. Exactly what I expected.

Now, think again what you wrote and this time remove the word "fix" and instead use the phrase "when the green die settles on a 2..."

You see eddie, this is a two dice problem, and if the peeker tells you at least one die is a 2 then either one of the two sentences is correct.
In fact, if both dice are showing a 2, either one of the two sentences is still correct because you are still considering one die.

It makes no difference which die is the 2 when there are only 2 dice in the problem.

Try to grasp this concept. Apparently it is very difficult for you.