For any two finite sets A and B

{3}

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{1, 2, 3, 4}

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{1, 2, 4, 5}

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{1, 2, 3, 4, 5, 6}

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Solution

The correct options are
A
{3}

C
{1, 2, 4, 5}

$n (A) = n (A - B) + n (A \cap B)$

Number of elements in A is equal to number of elements only in A plus number elements in both A and B.

$n (A) + n (A^{c}) = n (U)$

Number of elements of the universal set is equal to sum number of elements of a set and its complement.

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For any two finite sets A and B

The correct options are A {3} C {1, 2, 4, 5} n(A)=n(A−B)+n(A∩B) Number of elements in A is equal to number of elements only in A plus number elements in both A and B. n(A)+n(Ac)=n(U) Number of elements of the universal set is equal to sum number of elements of a set and its complement.