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Doctors Medicines MCQs Q&A

  1. 30
  2. 32
  3. 34
  4. 36
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1 Answers

Option 2 : 32

Calculation:

For better understanding, We can draw the following venn diagram according to the information we have been given.

⇒ For two sets A and B,

⇒ n(AᴜB) is the number of elements present in either of the sets A or B.

⇒ n(A∩B) is the number of elements present in both the sets A and B.

⇒ n(AᴜB) = n(A) + (n(B) – n(A∩B)

⇒ For three sets A, B and C,

⇒ n(AᴜBᴜC) = n(A) + n(B) + n(C) – n(A∩B) – n(B∩C) – n(C∩A) + n(A∩B∩C)

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