Suppose that A = {2, 4, 6}, B ={2, 6}, C ={4, 6}, and D ={4, 6, 8}. Determine which of these sets are subsets of which other of these sets.

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We know that $P$ is a subset of $Q$ if all elements of $P$ are also in $Q.$

Using this we conclude that

$B$ is a subset of $A,$

$C$ is a subset of $A,$

$C$ is a subset of $D.$

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