WBCS.LIVE practice question

Direction: A has 28 elements, B has 32 elements and A ∪ B has 40 elements. How many elements does A ∩ B have?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 10
  2. 20
  3. 8
  4. 12

Correct answer and explanation

Correct answer: 20