1 votes 1 votes Hi Guys, I think (B) is also correct option. what is your opinion ? Set Theory & Algebra made-easy-test-series discrete-mathematics set-theory&algebra set-theory + – Chhotu asked Nov 26, 2017 edited Mar 4, 2019 by adeebafatima1 Chhotu 479 views answer comment Share Follow See all 4 Comments See all 4 4 Comments reply Red_devil commented Nov 26, 2017 reply Follow Share yes AUB⊆A∩B iff |A| should be equal to |B|. 0 votes 0 votes Chhotu commented Nov 26, 2017 reply Follow Share Hi @Red_devil AUB⊆A∩B iff I think |A| = |B| is incorrect but A=B is correct. So AUB⊆A∩B iff A=B. 1 votes 1 votes Red_devil commented Nov 27, 2017 reply Follow Share @ Chhotu i mean if AUB⊆A∩B then A=B so when A=B then both should have same cardinality so |A| = |B|..please correct me if i am wrong! 0 votes 0 votes Kaluti commented Jan 31, 2018 reply Follow Share yes but what about that case when two sets |A|=|B| but A!=B then in that case it would become incorrect 0 votes 0 votes Please log in or register to add a comment.