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Q.

Two Newspapers A and B are published in a city. It is known that 25% of the city population reads A and 20% reads B while 8% reads both A and B. Further, 30% of those who reads A but not B look into advertisements and 40% of those who read B but not A also look into advertisements, while 50% of those who read both A and B look into advertisements. Then the percentage of the population who look into advertisements is

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a

12.8

b

13.9

c

13

d

15

answer is B.

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Detailed Solution

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nA=25100  nB=20100   nAB=8100nABc=251008100=17100nAcB=201008100=12100nAdvertisement=30100x17100+40100x12100+8100x50100=1390Percentage=1390100=13.9

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