Question

Let A={1,2}, B={2,4}, C={4,5,6}. Which of the following may be considered as the universal set for set A, B, C?

(a) {1,6,7,8,9}

(b) {1,2,3,4}

(c) {2,4,5,6}

(d) {1,2,3,4,5,6}

I have been asked this question in homework.

My doubt stems from Universal Set in section Sets of Mathematics – Class 11

Answer 1

The correct choice is (d) {1,2,3,4,5,6}

To explain: Universal set is the set which is superset of all basic sets of that type.

{1,2,3,4,5,6} is the set which contains all the elements of set A, B, C.