Equality of sets requires containment in:
ABoth durations
BBoth directions
CBoth dimensions
DBoth divisions
Answer & Solution
Correct answer: B. Both directions
1. One set sitting inside the other is not enough.
2. The containment has to hold each way.
3. If every element of A is in B and every element of B is in A, the sets are equal.
4. So the answer is both directions.
_Source: NCERT Class XI Mathematics, Ch 1 'Sets'_
Related questions
U = {1, 2, ..., 10} and A = {1, 3, 5, 7, 9}. The complement of A is:A = {2, 4, 6, 8} and B = {6, 8, 10, 12}. In A union B the elements 6 and 8 appear:In a Venn diagram the universal set is usually drawn as a:The collection of all subsets of A is called the:How many subsets does {1, 2} have?The open interval (a, b) leaves out:A set with exactly one element is called a:The empty set is a subset of: