Examine whether the following statements are true or false:
${ϕ} \subset {a, b, c}$

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Solution

The empty set is a subset of every set.

The empty set is a proper subset of every set except for the empty set.

$ϕ \subset {a, b, c}$ is true and ${ϕ} \subset {a, b, c}$ is false.

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