Questions
A survey shows that 63% of the people watch a news channel whereas, 76% watch an entertainment channel at a particular time. lf x% of the people watch both types of
channels, then
detailed solution
Correct option is C
Let A be the set of those people who watch news channel andB be the set of those people who watch entertainment channel.Thenn(A)=63,n(B)=76, and n(A∩B)=x∵ n(A∪B)≤100⇒ n(A)+n(B)−n(A∩B)≤100⇒ 63+76−x≤100⇒ x≥39Also, n(A∩B)≤min⋅{n(A),n(B)}⇒ x≤63∴ 39≤x≤63Similar Questions
Set A and B have 3 and 6 elements respectively. What can be the minimum number of elements in
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