Question

Which of the following two sets equal?

(a) {1,2,3} and {2,3,4}

(b) {1,3,5} and {1,3,5,7}

(c) {3,4,7} and {7,4,3}

(d) {1,2,7} and {2,7,1,4}

The question was asked during an internship interview.

My question is taken from Equal Sets topic in section Sets of Mathematics – Class 11

Answer 1

Right answer is (c) {3,4,7} and {7,4,3}

The best explanation: Two sets A and B are said to be equal if every element of set A is in set B and vice-versa.

{3,4,7} and {7,4,3} are equal.