Fraction of students were not wearing brown or black shoes is [tex]\frac{1}{5}[/tex].
Solution:
Given data:
Total number of students = 10
Number of students wearing brown shoes = 1
Number of students wearing black shoes = 7
Number of students not wearing brown or black = 10 – 1 – 7 = 2
Fraction of students not wearing brown or black
[tex]$=\frac{\text{Number of students not wearing brown or black}}{\text{Total number of students}}[/tex]
[tex]$=\frac{2}{10}[/tex]
[tex]$=\frac{1}{5}[/tex]
Hence fraction of students were not wearing brown or black shoes is [tex]\frac{1}{5}[/tex].