CAT Quantitative Ability Questions | CAT Set Theory questions
CAT/1997
Question . 21
A survey of 200 people in a community who watched at least one of the three channels — BBC, CNN and DD — showed that 80% of the people watched DD, 22% watched BBC, and 15% watched CNN.
What is the maximum percentage of people who can watch all the three channels?
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Explanatory Answer
Method of solving this CAT Quantitative Ability Question from Set Theory question
(b) We solve such question from venn diagram. For max. percentage of people who watch all three channels, we consider that there are no such people who watch only two channels.
Let x personals of viewers responded all the three channels.
