Classify the following as finite, infinite, singleton, or null sets. Also give the cardinal number of each set.
$P = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}$

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Solution

The set $P$ is a collection of all natural numbers from $2 to 12$ .
Therefore it is a finite set.
$n (P) = 11$

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