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In a certain city, only two newspapers A...

In a certain city, only two newspapers A and B are published. It is known that 25% of the city population reads A and 20% reads B, while 8% reads A and B. It is also known that 30% of those who rad A but not B, look into advertisements 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 advertisement. What percent of the population read on 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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