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How many are true subsets?

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Let U be the set { 1, 2, 3}. What are the 8 subsets? If A and B are arbitrary subsets of U, there are 64 possible relations of the form "A is subset of B". Count the number of true ones.

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True subsets are counted in an attached Word document.

Solution provided by:
Thokchom Sarojkumar Sinha, MSc
Education
  • BSc, Manipur University
  • MSc, Kanpur University
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