n(A) = 34, n(B) = 21, n(A cap B) = 12. How many elements are in A only?

  1. 34
  2. 43
  3. 9
  4. 22
Answer

D) 22

A only = n(A) - n(A cap B) = 34 - 12 = 22. SLO M-09-A-12 · Understanding

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