If the set A has p elements, B has q elements, then the number of elements in $A \times B$ is

$p + q$

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$p + q + 1$

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$p q$

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$p^{2}$

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Solution

The correct option is C
$p q$

$n (A \times B) = n (A) \times n (B)$

$= p \times q = p q$

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