Answer:
See attachment for Venn diagram
Percentage of only TV owners is 16%
Explanation:
Given



Required
Represent with a Venn Diagram
What percentage owned television
From the Venn Diagram and In sets theory; we have that
Total = (TV Owners - Radio and TV Owners) + (Radio Owner - Radio and TV Owners) + Radio and TV Owners + None
Represent Radio and TV Owners with y

Substitute 68% for TV Owners, 72% for Radio Owners, 12& for None:

Collect Like Terms


In Sets, Total represents 100%; So, we have

Make y the subject of formula


The percentage of only TV owners is calculated by subtracting y from TV owners
