AQuA-RAT train #28726 · Probability · Counting & chance

Forty ladies and fifty gentlemen are present at a party

Forty ladies and fifty gentlemen are present at a party. There are 20 couples among them. If a lady and a gentleman is selected at random, what is the probability that they will be not be a couple?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #28726

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