The number of students allowed to sit, N=4.
The total number of minutes, T=38 minutes.
Let x be the number of minutes for a student
[tex]\begin{gathered} 4\text{ students-}\longrightarrow38\text{ minutes} \\ 1\text{ student--x} \\ \text{Cross multiplying,} \\ x=\frac{38\text{ minutes}}{4\text{ students}}\times1\text{ students} \\ =\frac{38}{4\text{ }}\text{minutes} \end{gathered}[/tex]