Question

if n(u)=100.n(A)=50,n(B)=20 and n (A intersection B)=then n?

Answer 1

Answer:

n(AintersectionB) =40

Step-by-step explanation:

n(AUB) =n(A) +n(B) -n(AintersectionB)

30=50+20-X [since, n(U) =1-n(A) ]

X=70-30

X=40

Answer 2

Answer:

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Step-by-step explanation:

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