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How will you define the difference of two sets B-A?(a) {x: x € A and x Ɇ B}(b) {x: x Ɇ A and x € B}(c) {x: x € A and x € B}(d) {x: x Ɇ A and x Ɇ B}This question was posed to me in an online interview.My enquiry is from Sets and their Representations topic in division Sets of Mathematics – Class 11

Answer»

Correct CHOICE is (b) {x: x Ɇ A and x € B}

For explanation I would say: The DIFFERENCE of a SET A and B is denoted as A-B. A-B is a set of those ELEMENTS that are in the set A but not in the set B. Similarly, the difference of a set B and A is denoted as B-A. It is a set of those elements that are in the set B but not in the set A.


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