Tiffany has white and black shoes in her box. The probability of her pulling out a white pair is 2/5. What is the chance of Tiffany randomly pulling out a black pair of shoes?

Since Tiffany's box only contains white and black shoes, the probability of her pulling out a black pair of shoes would be 1 - 2/5 = 3/5.

Therefore, the chance of Tiffany randomly pulling out a black pair of shoes is 3/5.