Represent the following situation using Venn diagrams and answer the questions that follow. In a survey of 100 students in the i
1 answer:
There are 80 students studying at least one language
<h3>The Venn Diagram</h3>The given parameters are:
- Italian = 28
- German = 30
- French = 42
- Italian and French = 10
- Italian and German = 8
- German and French = 5
- Three languages = 3
Using the above parameters, we have:
German and French only = 5 - 3 = 2
Italian and French only = 10 - 3 = 7
Italian and German only = 8 - 3 = 5
French only = 42 - 7 - 2 - 3 = 30
German only = 30 - 2 - 5 - 3 = 20
Italian only = 28 - 7 - 5 - 3 = 13
See attachment for the Venn diagram
<h3>Students studying none of the languages</h3>This is calculated as:
None + At least one = Total
Using the Venn diagram, we have:
None + (3 + 2 + 5 + 7 + 13 + 20 + 30) = 100
This gives
None + 80 = 100
Subtract 80 from both sides
None = 20
Hence, there are 20 students studying none of the languages
<h3>Students studying French only</h3>This is calculated as
French only = French - French and Italian - French and German + All three
So, we have:
French only = 42 - 10 - 5 + 3
Evaluate
French only = 30
Hence, there are 30 students studying French only
<h3>Students studying at least one</h3>In (b), we have:
None + At least one = Total ⇒ None + (3 + 2 + 5 + 7 + 13 + 20 + 30) = 100
By comparing both equations, we have
At least one = 3 + 2 + 5 + 7 + 13 + 20 + 30
This gives
At least one = 80
Hence, there are 80 students studying at least one language
Read more about Venn diagram at:
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