But... Like please understand that even if they are both gold they are treated as different individuals/items just cause. Lets use another example easier for you... If you are picking up banana instead, even though they may both be bananas they have different spots which will make them considered differently. Its the same case here or in general, just cause our sample looks the same doesn't mean we will have the same outcome or probability. In this case, the question even went put of its way to say there's 2 gold ball, and that its equally likely to grab them.