AQuA-RAT train #11288 · Probability · Counting & chance
A box contains 3 red balls and 4 black balls
A box contains 3 red balls and 4 black balls. One by one, every ball is selected at random without replacement. What is the probability that the fourth ball selected is black?
AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #11288
Stuck? A gentle nudge
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