Cartesian Product of two sets

 Q .   If G = { 7,8 }, H = { 5, 4, 2 }, find G x H and H x G.


Sol : 
        G x H ={ 7, 8 } x { 5, 4, 2 } ={ (7, 5), (7, 4), (7, 2), (8, 5), (8, 4), (8,2) }
and
        H x G = { 5, 4, 2 } x {7, 8 } = { (5,7), (5, 8), (4, 7), (4, 8), (2, 7), (2, 8) }