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If n (A) =3 ,n(3)=6 and A sube B .Then ...

If `n (A) =3 ,n(3)=6` and `A sube B` .Then the number of elements in `A cup B` is equal to

A

3

B

9

C

6

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Since `A sube B, A sub B=B `
So, n `(A cup B) = n(B) = 6 `
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