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If n(A)=8, n(B)=6 and the sets A and B a...

If `n(A)=8, n(B)=6` and the sets A and B are disjoint, then find `n(A uu B)`.

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The correct Answer is:
`B`
Given, `n(A)=8` and `n(B)=6`. A and B are disjoint `implies A nn B=phi`
`implies n (A nn B)=0`
`:. n (A uu B)=n (A)+n(B)-n (A nn B)=8+6-0=14`
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