AQuA-RAT train #83778 · Probability · Counting & chance

An urn contains 15 black and 5 white balls

An urn contains 15 black and 5 white balls. Two balls are drawn from the urn one after the other without replacement. What is the probability that both drawn balls are black?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #83778

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