Let A and B be two sets such that n ( A ) = 3 and n ( B ) = 2. If ( x , 1), ( y , 2), ( z , 1) are in A × B , write A and B .

Question

Philoid · Accepted Answer

Here, A×B ={(x,1) ,(y,2) ,(z,1)} and n(A)=3 , n(B)=2

We know ,A×B = {(x,y) : xϵA and yϵ B}

∴ A={x,y,z} and B={1,2}