alleryA = {2, 4, 6, 8} and B = {6, 8, 10, 12}. In A union B the elements 6 and 8 appear:
ANot at all
BFour times
COnce each
DTwice each
Answer & Solution
Correct answer: C. Once each
1. The union collects all elements of both sets.
2. Common elements are taken only once.
3. So 6 and 8 appear once each.
_Source: syllabus Mathematics, Chapter 1, Sets._
Keep practising Sets and Relations
Browse all Sets and Relations questions for CBSE Class 11 (Commerce), or explore more Mathematics topics.
Related questions
Who published the first axiomatisation of set theory in 1908?In which year did Bertrand Russell show that a set of all sets leads to a contradiction?Within a universal set U, the complement of the empty set isBy De Morgan's law, (A ∪ B)' is equal toFor any subset A of U, the complement of A' isU is all students of a mixed class and A is all its girls. What is A'?The sets A - B, A ∩ B and B - A are alwaysIf V = {a, e, i, o, u} and B = {a, i, k, u}, find V - B.