Lemma
MediumCounting & chance
AQuA-RAT train #49324 · Probability · Counting & chance

In a bag there are a certain number of black balls and…

In a bag there are a certain number of black balls and white balls. The probability of picking up exactly 1 white ball when 2 balls are randomly drawn, is 1/2. Which of the following is the ratio of the number of black balls to white balls in the bag

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #49324

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