The number of rounds the student won is required.
The number of rounds the student won was 15.
The total number of rounds played is [tex]20[/tex].
The percentage the student wins is [tex]75\%[/tex]
The number of times he won was
[tex]20\times 75\%\\ =20\times \dfrac{75}{100}\\ =20\times 0.75\\ =15[/tex]
The number of rounds the student won was 15.
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