true or false true or false set any collection objects true or false proper subset set itsel


  1. True or false. A set is any collection of objects.
  2. True or false. A proper subset of a set is itself a subset of the set, but not vice versa.
  3. True or false. The empty set is a subset of every set.
  4. True or false. If A ∪ B = ∅ , then A =  ∅  and B =  ∅  .
  5. True or false. If A ∩ B =  ∅  , then A =  ∅  or B =  ∅  or both A and B are empty sets.
  6. True or false. (A ∪ Ac)c =  ∅  .
  7. True or false. [A ∩ (B ∪ C)]c = (A ∩ B)c    (A    C)c
  8. True or false. n(A) + n(B) = n(A  ∪  B) + n(A    B)
  9. True or false. If A ∈ B, then n(B) = n(A) + n(Ac  B).
  10. True or false. The number of permutations of n distinct objects taken all together is n!
  11. True or false. P(nr) = rC(nr).
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