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goyangi
Answer = 20%

Explanation:

% of TV = 65%
% of Newspaper = 40%
% of TV + Newspaper = 25%

% of TV but not Newspaper = 65% - 25% = 40%
% of Newspaper but not TV = 40% - 25% = 15%

% of TV only + Newspaper only + TV and Newspaper = 40% + 15% + 25% = 80%

% of neither TV nor Newspaper = 100% - 80% = 20%

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