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Let A and B be two sets such that n(A)=1...

Let A and B be two sets such that `n(A)=16 ,\ n(B)=14 , n(AuuB)=25.` Then `n(AnnB)` is equal to `30` b. `50` c. `5` d. none of these

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Given,`n (A ∪ B) = n (A) + n (B) – n (A ∩ B)`
`25 = 16 + 14 – n (A ∩ B)`
`n (A ∩ B) = 30 – 25`
`= 5`
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