In a certain city of 15000 families...
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In a certain city of 15000 families, 3.5% of families who read A but not B look into advertisements, 25% of the families who read B but not A look into advertisements and 50% of the families, who read both A and B look into advertisements. It is known that 8000 families read A, 4000 read B and 1000 read both A and B. Choose the correct answer : (1) The number of families who look into advertisements (1) 1295 (2) 1395 (3), 1495 (4) 1500 2. The number of families who read none of the newspaper (1) 3000 (2) 4000 (3) 6000 (4) No family The number of families who read atmost one of the newspaper (1) 11000 (2) 12000 (3) 13000 (4) 14000

JEE/Engineering Exams
Maths
Solution
370
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1000 read both A and B ( 50 %=500 ) 7000 read only A ( 3.5 %=245 ) 3000 read only 3 ( 25 %=frac{25}{100} times 3000=750 ) Totall = 750 + ( 245+500 ) = 1495 families will look into the advertisement,
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