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In a certain city, only 2 newspapers A and B are published. It is known that 25% of the city population read A and 20% read B while 8% reads both A and B. It is also known that 30% of those who read A but not B look into advertisement and 40% of those who read B but not A look into advertisements while 50% of those who read both A and B look into advertisements. What is the percentage of the population who read an advertisement?

Text Solution

Verified by Experts

The correct Answer is:
7
Let number of people in city = 100
`A uu overline(B) = 17`
30% of `(A uu overline(B)) = 5.1`
`overline(A) uu B = 12`
40% of `(overline(A) uu B) = 4.8`
`A uu B = 8`
50% of `(A uu B) = 4`
Total = 5.1 + 4.8 +5 = 13.9
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