Question

n(B)=40,n(AπB) =20,n(AUB) =35,find n(A)
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Answer 1

Answer:

n(AuB)=n(a)+n(b)-n(a intersections b)===35=n(a)+40-20

Step-by-step explanation:

35=n(a)+20=n(a)=(-35+20)=35-20=15