Q. 64.0( 3 Votes )

If A and B be two

Answer :

Given: n(A) = 3, n(B) = 4 and n(A B) = 2


(i) n(A × B) = n(A) × n(B)


n(A × B) = 3 × 4


n(A × B) = 12


(ii) n(B × A) = n(B) × n(A)


n(B × A) = 4 × 3


n(B × A) = 12


(iii) n((A × B) (B × A)) = n(A × B) + n(B × A) – n((A × B) (B × A))


n((A × B) (B × A)) = n(A × B) + n(B × A) – n(A × B) + n(B × A)


n((A × B) (B × A)) = 0


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