Question

if set p has 3 elements, Q four and R two then the PxQxR contains​

Answer 1

ven A and B are two sets with number of elements p and q respectively.

The cartesian product of A and B=A×B={(a,b):(a∈A) and (b∈B)}

Number of elements in A×B=∣A×B∣=∣A∣.∣B∣=pq

Any relation from A to B is a subset of A×B.  

Hence number of relations from A to B is the number of subsets of A×B

=2  

∣A×B∣

=2  

pq