Mathematics, 11.03.2021 21:50 alecnewman2002
In a library the ratio of sci-fi books to historic fiction is 3 : 7. The ratio of historic fiction books to mystery books is 21 : 8. If there are 81 sci-fi books, how many mystery books are there?
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In a library the ratio of sci-fi books to historic fiction is 3 : 7. The ratio of historic fiction b...
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