📐 Mathematics · Permutations and Combinations · JEE

Total number of functions from set A (3 elements) to set B (4 elements):

Answer: 64.

Correct answer: B. 64

Explanation: Each element of A can map to any of 4 elements in B. Total = 4<sup>3</sup> = 64.

Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.

Concept context

Counting, arrangements, and selections