In a town of 10,000 families it was found that 40% families buys newspaper A , 20% buy newspaper B , and 10% families buy newspaper C , 5% families buy A and B , 3% buy B and C and 4% buy A and C . If 2% buy all the three newspapers , then number of families which buy A only is

Asked by Deepak Singh | 18th Apr, 2014, 08:29: PM

Expert Answer:

Using Venn Diagrams with n(A∩B∩C). 
Clearly, 40 families buy none of the newspapers.
60 families buy atleast one of thenewspapers.
33 families buy newspaper A only.
14 families buy newspaper B only.
5 families buy newspaper C only.
 
Venn Diagram to solve problems


Answered by  | 21st Apr, 2014, 03:17: PM

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