Answer:
[tex]Fraction=\frac{1}{5}[/tex]
Step-by-step explanation:
Total number of students[tex]=10[/tex]
Students wearing brown shoes[tex]=1[/tex]
Students wearing black shoes[tex]=7[/tex]
Number of students wearing black or brown shoes[tex]=1+7=8[/tex]
Number of students not wearing brown or black[tex]=10-8=2[/tex]
Fraction of students not wearing brown or black[tex]=\frac{2}{10}=\frac{1}{5}[/tex]