n(A) = 60, n(B) = 45 and n(A cap B) = 20. Find n(A cup B).

  1. 105
  2. 40
  3. 125
  4. 85
Answer

D) 85

n(A cup B) = n(A) + n(B) - n(A cap B) = 60 + 45 - 20 = 85. SLO M-09-A-12 · Understanding

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