Question 479 of 480

If n(A) = 15, n(B) = 20, and n(A ∩ B) = 5, what is n(A ∪ B)?

  • 25
  • 30
  • 35
  • 40

Correct Answer: B

Explanation
n(A ∪ B) = n(A) + n(B) - n(A ∩ B) = 15 + 20 - 5 = 30.
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