1. Tardigrade
  2. Question
  3. Mathematics
  4. If A - 2, 4, 3 B - 7, 8, 9 then n(A× B) is equal to

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. If $A -\left\{2, 4, 3\right\}, B -\left\{7, 8, 9\right\}$,then $n\left(A\times B\right)$ is equal to

Relations and Functions

Solution:

$A \times B = \left\{\left(2, 7\right),\left(2, 8\right)\left(2, 9\right),\left(4, 7\right), \left(4, 8\right), \left(4, 9\right),\left(5, 7\right),\left(5, 8\right), \left(5, 9\right)\right\}$
$n \left(A \times B\right) =n\left(A\right). n\left(B\right) = 3\times3 =9$