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Doctors Medicines MCQs Q&A

  1. 100
  2. 150
  3. 200
  4. 250
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1 Answers

Option 3 : 200

Concept:

Let A, B and C be three finite sets and U is the finite universal set, then

  1. n (A ∪ B) = n (A) + n (B) – n (A ∩ B)
  2. n (A ∪ B) = n (A) + n (B) ⇔ A ∩ B = ϕ
  3. n (A - B) = n (A) – n (A ∩ B) = n (A ∩ B’)
  4. n (A ∪ B ∪ C) = n (A) + n (B) + n (C) – n(A ∩ B) – n (B ∩ C) – n (A ∩ C) + n (A ∩ B ∩ C)
  5. n (A’ ∪ B’) = n = n (U) – n (A ∩ B)
  6. n (A’ ∩ B’) = n = n (U) – n (A ∪ B)
  7. n (A Δ B) = n (A) + n (B) – 2 n (A ∩ B)
  8. n (A’) = n (U) – n (A)
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