1. Tardigrade
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  3. Mathematics
  4. If set A has 3 elements and the set B = 3,4, 5 then find the number of elements in (A × B).

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Q. If set $A$ has $3$ elements and the set $B = \{3,4, 5\}$, then find the number of elements in $(A \times B)$.

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Solution:

$n(A) = 3$ and $n(B) = 3$
$\therefore n(A \times B) = 3 \times 3 =9$