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If S and T are two sets such that S has 21 elements, T has 32 elements, and `Snn T`has 11 elements, how many elements does `Suu T`have? |
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Answer» Here, `n(S)=21,n(T)=32,n(ScapT)=11` Now, `n(S cup T)=n(S)+n(T)-n(S cap T)` `rArrn(S cupT)=21+32-11=42` Therefore, number of elements in `(S cup T)=42`. |
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