Use ?, ?, ?, or both ? and ? to make a true statement. {10, 11, 12} ________ {10, 11, 12} ? ? ? and ? ?

Question

Use ⊆, ?, ⊂, or both ⊂ and ⊆ to make a true statement.

{10, 11, 12} ________ {10, 11, 12}

⊂

⊆

⊂ and ?

?

Answer 1

{10,11,12) ⊆ {10,11,12}

 

It would not be technically correct to use ⊂, because no set is a proper subset of itself. 

 

(You could also use the equals sign to accurately describe the relation of the two sets.)

Answer 2

Since the two sets are identical, the set on the left is a subset of the one on the right, but is not a proper subset.