Paper I · 9 Logical Reasoning & Analytical Ability · 9.10 Syllogism and verbal reasoning

9.10.2 Venn diagrams: relationships between classes

A Venn question asks either how classes sit with respect to each other (inside, overlapping or apart) or how many members fall in a region; the first is answered by logic about the words, the second by the inclusion–exclusion formula.

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  • Standard level
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Key terms

  • Venn diagram
  • classes
  • subset
  • overlap
  • disjoint
  • concentric circles
  • region reading
  • union
  • intersection
  • inclusion exclusion
  • neither
  • exactly two
  • only one
  • maximum overlap
  • minimum overlap

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Common trapsFoundation
  5. Quick revisionFoundation

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