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

The number of onto functions from {1, 2, 3, 4} to {1, 2} is:

Answer: 14.

Correct answer: B. 14

Explanation: Total functions 2⁴ = 16 minus the 2 constant ones = 14.

Concept context

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