The answer is: " 7 books " .
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 Explanation:
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63 books per 9 students = How many books per individual students?
The answer is: 
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63 books/ 9 students = (63/9) books per student ;
 = (63 ÷ 9) books per student ;
 = 7 books per student.
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 So; each student will receive "7 books" . 
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