Lemma
MediumCounting & chance
AQuA-RAT train #6259 · Probability · Counting & chance

In a box of 11 pens, a total of 3 are defective

In a box of 11 pens, a total of 3 are defective. If a customer buys 2 pens selected at random from the box, what is the probability that neither pen will be defective?

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

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #6259

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