5/4 < x < 27/11
=> 55/44 < x < 108/44
=> x = { 56/44 ; 57/44 ; 58/44 ; ....; 106/44 ; 107/44 ; 108/44 }
55/44<x<108/44
=> x thuộc { 56;57;58;...;106;107}
5/4<x<27/11
\(\Rightarrow\)55/44<x<108/44
Hay 55<x<108.
Vậy x={54;53;52;51;.....;106;107}
Đúng 90%