Mathematics - Sets and Relations Question with Solution | TestHub

As$n\left(A\right)=2$and$n\left(B\right)=4$

Hence$n\left(A\times B\right)=8$

Now subsets of$A\times B$containing$3$or more elements will be
=Total$-$(no element$-$one element$-2$elements)

=$2^8{-}^8{C}_0{-}^8{C}_1{-}^8{C}_2=219$