Lemma
MediumCounting & chance
AQuA-RAT train #8018 · Probability · Counting & chance

There are 9 books on a shelf that consist of 2 paperback…

There are 9 books on a shelf that consist of 2 paperback books and 7 hardback books. If 5 books are selected at random without replacement, how many different combinations are there which include at least one paperback book?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #8018

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