Question

Which of the following is not a subset of the set A= {{a} , 1 , 2}​

Answer 1

Answer:

{a} is not subset to set A

Answer 2

The correct answer is {a}.

{a} is not a subset to A.

• A subset is a part or element of an entire collection called a set.
• {a} has been included into another set {1,2} which is not the correct format to write subsets.
• According to the rule of listing subsets, the set itself is a subset of itself. Therefore, {A} would be the subset, not {a}.