Question

Q.4) -n(AUB) If n(A) = 7, n(B) = 13, n(ANB) = 2 Ans. We know n(A U B) = * n(AUB) -N(AUB) =7+_____-______
=_____-_____
=_______-________
=_______
therefore n(AUB)=_____

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Answer 1

n(AuB)=n(A)+n(B)-n(AnB)

= 7+13-2

= 20-2

= 18