CAT 2020 Slot 2 QA Q13 Set Theory

Question 13 of the Quantitative Ability (QA) section, CAT 2020 Slot 2, with CAT's official answer.

Students in a college have to choose at least two subjects from chemistry, mathematics and physics. The number of students choosing all three subjects is 18, choosing mathematics as one of their subjects is 23 and choosing physics as one of their subjects is 25. The smallest possible number of students who could choose chemistry as one of their subjects is
  1. A
    22
  2. B
    19
  3. C
    20
  4. D
    21

Answer: (C) 20 Set Theory MCQ

A worked solution for this question is being written. Meanwhile, practise it in a timed mock and see how other aspirants did.

Same concept in other years

See every question on Three-set Venn diagrams: maximise or minimise a region.

More Set Theory questions from CAT

All 9 Set Theory questions asked since 2017.