n(A) = 30, n(B) = 25 and n(A cup B) = 45. Find n(A cap B).

  1. 20
  2. 15
  3. 10
  4. 55
Answer

C) 10

n(A cap B) = n(A) + n(B) - n(A cup B) = 30 + 25 - 45 = 10. SLO M-09-A-12 · Understanding

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