>>10886495

Probability of picrel is approximately 1. The selection method gives every dust speck an equal probability of being selected. As an example, if we assume each box has 1 000 000 specks, there are 1 000 001 gold specks total. Out of those specks, 1 000 000 are in the gold box, and 1 is in the middle silver box. Thus the probability that the rest of the box is gold is [math]\frac{1 000 000}{1 000 001}[/math]