📐 Mathematics · Relations and Functions (Class 12) · JEE

The number of bijections from {1, 2, 3} to {1, 2, 3} is:

Answer: 6.

Correct answer: B. 6

Explanation: The number of bijections on a 3-element set is 3! = 6.

Concept context

Types of relations, equivalence classes, one-one and onto functions, composition, and invertible functions