Mathematics, 27.05.2020 23:04, graciebrene1590

If 40% of graphic novels were purchased by readers 30 years of age or older and 15 were chosen at random, what is the probability that at least 10 of them are 30 years or older?

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If 40% of graphic novels were purchased by readers 30 years of age or older and 15 were chosen at ra...