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Is it a Subset?

Probability Level 1

$A = \{6,2,4,1,5\}$ .

Which of the options below is not a proper subset of $A$ ?

$\{2\}$
$\{1,2,3\}$
$\{6,5,2,1\}$
$\{1,2,4,5\}$

\{1,2,3\}

\{6,5,2,1\}

\{2\}

\{1,2,4,5\}

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by Karleigh Moore

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