Friday, January 21, 2011

Back in School Counting

Students of Nan Hua High School gathering in t...Image via Wikipedia
Of 28 students taking at least one subject, the number taking Math and English but not History equals the number taking Math but not History or English. No student takes English only or History only, and six students take Math and History but not English. The number taking English and History but not Math is 5 times the number taking all three subjects.

If the number taking all three subjects is even and non-zero, how many are taking English and Math but not History?


  1. This Question is quite complex,data has to be interpreted in set diagram to resolve it easily.Answer for the question is 5 students. :)

  2. Venn diagrams would come in very handy for this one.


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