MadeEasy Subject Test: Engineering Mathematics - Sets

Question

Hi Guys,

I think (B) is also correct option. what is your opinion ?

Comments

yes  AUB⊆A∩B iff  |A| should be equal to |B|.

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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.

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@ 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!

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yes but what about that case when two sets |A|=|B| but A!=B then in that case it would become incorrect