A pack of cards has a 10% chance of containing a rare card. You buy 10 packs of cards. What is the probability that you end up with at least 2 rare cards?

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A pack of cards has a 10% chance of containing a rare card. You buy 10 packs of cards. What is the probability that you end up with at least 2 rare cards?

integrate ∫ 4x(x-1) / (2x-1)2

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