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Vincen
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Each book on a certain shelf is labeled by a single category. For every 2 history books, there are 7 fantasy books and for every 3 fantasy books, there are 5 reference books. If the proportion of history to reference books is doubled, while the proportion of fantasy to reference books is maintained, which of the following could be the number of history books if there are fewer than 60 fantasy books on the shelf after the changes?
A. 6
B. 21
C. 24
D. 35
E. 36
[spoiler]OA=C[/spoiler]
Source: Manhattan GMAT
A. 6
B. 21
C. 24
D. 35
E. 36
[spoiler]OA=C[/spoiler]
Source: Manhattan GMAT
