Q. 44.1( 51 Votes )

If S and T

Answer :

Given-


n(S) = 21, n(T) = 32, and n(S T) = 11


We know that-


n(S T) = n(S)+ n(T) - n(S T)


= 21+32 - 11


= 53 - 11


= 42


n(S T) = 42


Thus, the no. of elements in n(S T) is 42.


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