how many elements does S ∪ T have?

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If S and T are two sets such that S has 21 elements, T has 32 elements, and S ∩ T has 11 elements, how many elements does S ∪ T have?
13
Oct
If S and T are two sets such that S has 21 elements, T has 32 elements, and S ∩ T has 11 elements, how many elements does S ∪ T have? and S ∩ T has 11 elements how many elements does S ∪ T have? If S and T are two sets such [...]
Posted in: Chapter 1 - Sets , Maths , NCERT Exemplar Class 11 ,
Tags: and S ∩ T has 11 elements , how many elements does S ∪ T have? , If S and T are two sets such that S has 21 elements , T has 32 elements ,