3) If A has 16 elements B has 21 elements and A U B has 6 elements the – InterviewSolution

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3) If A has 16 elements B has 21 elements and A U B has 6 elements then what arethe number of elements in An B?4) If A = { 2, 6, a, { 2 }, { 2, a l} then { 2, a reAsay, true or false.

Answer»

n(A intersection B)=n(A)+n(B)-n(AUB)=16+21-6=31

2 and a are elements of A so yes given sentence is true.

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