Mathematics, 11.02.2020 02:27 loraine8401

Professor Halfbrain has 10 books on mathematics, 8 books on chemistry and 5 books on astrology (he’s a Gemini). He is packing for vacation, and hastily throws 7 books into his suitcase. What is the probability that he has selected at least 2 books from each subject?

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Professor Halfbrain has 10 books on mathematics, 8 books on chemistry and 5 books on astrology (he’s...

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