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Answer:
15 students
Step-by-step explanation:
The fraction of students who will repeat the exam is:
[tex]1-\frac{6}{9}[/tex]
=[tex]\frac{9}{9} -\frac{6}{9} =\frac{3}{9}[/tex]
simplified is:
[tex]\frac{1}{3}[/tex]
Extract this fraction of 45:
[tex]45(\frac{1}{3} )=\frac{45}{3} =15[/tex]
Hope this helps