Question

If n(A) = 7, n (A ∪ B) = 11, and n(B) = 5, then what is n (A ∩ B)?

Answer 1

Answer:

1

Step-by-step explanation:

From set theory

n (A ∪ B)=n(A) +n(B) - n (A ∩ B)

Using the given data in this eq

11=7+5-n (A ∩ B) implies

n (A ∩ B)=1

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