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předchozí úlohaÚloha ID 1486 - English sectiondalší úloha


Three languages are taught at a high school – French, English and German. We know, that:

  • Every student learns at least one foreign language.
  • 90 students learn exactly two languages, each combination of two languages has the same number of students.
  • One quarter of all students learn all three languages.
  • There are 200 students at the school.
  • 135 students learn French.

Choose an incorrect statement:





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