Question

if the set A has 4 elements & the set B ={2,3,5,7,9} then find the number of elements in ( A× B)​

Answer 1

Answer:

n( A×B)=20

Step-by-step explanation:

We know that,

n(A)× n(B)= n(A×B)

Here,

n(A)= 4 ,. n(B)= 5

therefore,

n(A×B)= n(A)× n(B)

=. 4×5

=20