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Which of the following sets are equal?(a) {a, b, c, d} and {d, c, b, a}(b) {4,8,12,16} and {8,12,16,18}(c) {x : x is a multiple of 10} and {10,20,30}(d) {2,4,6,8} and {x : x is an even number}This question was addressed to me during an interview.This question is from Equal Sets in chapter Sets of Mathematics – Class 11

Answer»

Right ANSWER is (a) {a, B, c, d} and {d, c, b, a}

To elaborate: {a, b, c, d} and {d, c, b, a} are equal sets.

{4,8,12,16} and {8,12,16,18} are not equal their elements are not matching.

{X : x is a multiple of 10} = {10,20,30,………} which is infinite set and not equal to {10,20,30}.

{x : x is an even number} = {2,4,6,………….} which is an infinite set and not equal to {2,4,6}.


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