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The following are the results of a survey conducted on a small cross-section of
students from Symbiosis Group of institutes, to determine the readership of
three magazines. This survey was conducted in Dec. 2006.
- Number of students who read only Business India was 40
- 60 students read only Outlook
- 110 students read only India Today
- 30 students read all three magazines
- 20 read Business India and India Today, but not Outlook
- 50 read Business India and Outlook, but not India Today
- 40 read Outlook and India Today, but not Business India
When another survey was conducted in May 2007 with the same set of students, their
tastes had changed and the findings were different. All of them read India Today. 120 read
Outlook, and no one read Business India. Hence, in May 2007, how many students read
only India Today?
From the statements given in question, the above venn diagrams represents the results of the surveys conducted in 2006 and 2007.
From the venn diagam that represents the 2006 survey, we sum up all the groups of people to get total no. of students which is 350.
The same set of students were surveyed in 2007 and from the statements, we drew the venn diagram for 2007 survey. All 350 students read India Today and among them 120 read Outlook. So, the no. of students who read only India Today = 350-120 = 230
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