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 read 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 :

 

  • Option 1)

    13.9

  • Option 2)

    12.8

  • Option 3)

    13

  • Option 4)

    13.5

 

Answers (1)
S solutionqc

Let us consider total percent be 100 . The from venn diagram 

\\A=25,B=20,A\cap B=8\\\\\:30 ^{o}/_{o} \:\:of \:\:\:A\cap\bar{B}=5.1^{o}/_{o}\\\\\:40 ^{o}/_{o} \:\:of \:\:\:\ \bar{A} \cap B=4.8^{o}/_{o}

\\50 ^{o}/_{o} \:\:of \:\:\:\ A \cap B=4^{o}/_{o}

Total person took into advertisement =13.9 ^{o}/_{o}


Option 1)

13.9

Option 2)

12.8

Option 3)

13

Option 4)

13.5

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