Choose the incorrect statementa)If a set has only one element, we call...
A set A is a proper subset of a set B if A is a subset of B and there is at least one element of B that's not an element of A. Thus, the void set is a subset of all sets, and it's a proper subset of every set except itself
View all questions of this test
Choose the incorrect statementa)If a set has only one element, we call...
Incorrect statement:
The incorrect statement is option 'C', which states that "is not a subset of any set".
Explanation:
To understand why option 'C' is incorrect, we need to understand the concept of subsets.
Definition of Subset:
A set A is said to be a subset of set B (denoted as A ⊆ B) if every element of A is also an element of B.
Explanation of option 'C':
The statement " is not a subset of any set" is incorrect because every set is a subset of itself. This is known as the reflexive property of subsets.
Reflexive Property:
According to the reflexive property of subsets, for any set A, A ⊆ A is always true. This means that every set is a subset of itself.
Example:
Let's consider a set A = {1, 2, 3}. In this case, A is a subset of itself because every element in A (1, 2, and 3) is also an element of A. So, A ⊆ A is true.
Conclusion:
In conclusion, every set is a subset of itself. Option 'C' is incorrect because it states that "is not a subset of any set".
Choose the incorrect statementa)If a set has only one element, we call...
phi is a subset of every set