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Mathematics, 14.09.2019 18:10 mterzic1
Aprofessor is interested in the average length of books in her library. she has divided her books into a few different categories: 235 books on mathematics, 290 books on sports, and 166 books on interior design. rather than examining all the books, she plans to use a stratified sample of 50 books. how many of the sports books should she choose?
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