in Set Theory & Algebra edited by
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The no of elements which do not have complements in the above lattices is __________

in Set Theory & Algebra edited by
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  • $0^{-1}$ = 1
  • $1^{-1}$ = 0
  • $a^{-1}$ = b
  • $b^{-1}$ = a

Other than this 4 elements no other element has complements.

Total number of elements = 10

Number of elements that has no complement = 10 – 4 = 6.