1.

If n (A) =3 ,n(3)=6 and `A sube B` .Then the number of elements in `A cup B` is equal toA. 3B. 9C. 6D. Non of these

Answer» Correct Answer - C
Since `A sube B, A sub B=B `
So, n `(A cup B) = n(B) = 6 `


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