Question

If set A and B have 3 and 4 elements
respectively then the number of
subsets of set (A x B) is ?​

Answer 1

Answer:

No of subets in A x B is 12.

Explanation:

cardinalities of set A is 3 and set B is 4 then the cardinality of A x B will be: An x Bn, wheren is the cardinality of the set.

cardinalities mean no. of elements in a set.

lets say A = {1,2,3} and B= .{a,b,c,d}

then A x B :

(1,a), (1,b), (1,c), (1,d), (2,a), (2,b), (2,c), (2,d), (3,a), (3,b), (3,c), (3,d).