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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
Let s,d and t represent the number of students who like only 1, only 2 and all 3 magazines.
Total Number of Student = s+d+t
s = $$40+60+110\ =\ 210$$
d = $$20+50+40\ =\ 110$$
t = 30
Hence total students = $$210+110+30=350$$
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