A bag contains 12 white and 18 black balls

A bag contains 12 white and 18 black balls. 2balls are drawn in succession. What is the probability that first is white and second is black?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #407