baladon99 wrote:Out of 100 families in the neighborhood 50 have radios, 75 have TVs and 25 have VCRs. Only 10 families have all three and each VCR owner also has a TV. If some families have radio only , how many have only TV ?
A) 30
B) 35
C) 40
D) 45
I received a PM asking me to comment.
Draw a Venn Diagram.
Insert the known values, working from the center out.
10 own all three and each VCR owner has a TV:
Plug in the answers, which represent the number who own only a TV.
Fill in the remaining values.
When the correct answer is plugged in, Total = 100.
Answer choice B: 35 own only a TV.
Adding all the values in the Venn Diagram:
25+15+35+10+15 = 100.
Success!
The correct answer is
B.
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