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I have $3$ different mathematics textbooks, $2$ different psychology textbooks, and $2$ different chemistry textbooks. In how many ways can I place the $7$ textbooks on a bookshelf, in a row?

 Jun 22, 2024
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\(\frac{7!}{3!\times2!\times2!}=\boxed{210}\)

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 Jun 22, 2024

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