Students studying in both Class X and Class XI at the same time form a set that is:
AA universal set
BThe empty set
CAn infinite set
DA singleton set
Answer & Solution
Correct answer: B. The empty set
1. Nobody can be in two classes at once.
2. The set has no element at all.
3. It is the empty set.
_Source: NCERT Class 11 Mathematics, Chapter 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: