If A= {2,3,5} and U be the set of prime factors of 210 then find A’.(a) {2,3,5}(b) {2,3,5,7}(c) {7}(d) ΦThis question was addressed to me in an online quiz.My doubt is from Complement of a Set topic in chapter Sets of Mathematics – Class 11

If A= {2,3,5} and U be the set of prime factors of 210 then find A’.

1.	If A= {2,3,5} and U be the set of prime factors of 210 then find A’.(a) {2,3,5}(b) {2,3,5,7}(c) {7}(d) ΦThis question was addressed to me in an online quiz.My doubt is from Complement of a Set topic in chapter Sets of Mathematics – Class 11
Answer» The correct choice is (c) {7} EXPLANATION: 210=235*7 => U = {2,3,5,7}. Complement of a set A is a set which CONTAINS elements of U which are not the elements of A. So, A’=U-A={2,3,5,7} – {2,3,5} = {7}.

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If A= {2,3,5} and U be the set of prime factors of 210 then find A’.(a) {2,3,5}(b) {2,3,5,7}(c) {7}(d) ΦThis question was addressed to me in an online quiz.My doubt is from Complement of a Set topic in chapter Sets of Mathematics – Class 11

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