Bunuel wrote:
In a class, 30 percent of the boys read The Telegraph every day. Boys constitute 60 percent of the class and 40 percent of the whole class reads The Telegraph. What percentage of the class reads only gossip pages or only cartoons?
(1) Among the boys who read The Telegraph, 40 percent read only the cartoons and the rest read only the sports pages.
(2) Among the girls who read The Telegraph, 60 percent read only the gossip pages and the rest read only the fashion pages.
Boys = 60%
Girls = 40%
Telegraph +Boys = 30% of 60% = 18%
Telegraph = 40%
Telegraph +Girls = 22%
(1) Telegraph + Boys + Only Cartoon = 40% of 18% (Rest do not read only cartoon or only gossip)
(2) Telegraph +Girls + Only Gossip Pages = 60% of 22% ((Rest do not read only cartoon or only gossip)
Question is what % of reads only gossip pages or only cartoons (the question does not asks within telegraph reading population)
What if Boys + other source than telegraph for reading only gossip or only cartoon (means we do not have the information about boys who do not read telegraph)
What if Girls + other source than telegraph for reading only gossip or only cartoon (means we do not have the information about girls who do not read telegraph)
Hence E
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