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)

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

Preparation Products

Knockout JEE Main Sept 2020

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 12999/- ₹ 6999/-
Buy Now
Rank Booster JEE Main 2020

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 9999/- ₹ 4999/-
Buy Now
Test Series JEE Main Sept 2020

Take chapter-wise, subject-wise and Complete syllabus mock tests and get in depth analysis of your test..

₹ 4999/- ₹ 1999/-
Buy Now
Knockout JEE Main April 2021

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout JEE Main April 2022

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 34999/- ₹ 24999/-
Buy Now
Exams
Articles
Questions