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Relations and Functions
RS Aggarwal
CBSE
Grade 12

Question:

Set $A$ has $3$ elements and set $B$ has $4$ elements. Number of one-one functions from $A$ to $B$ is:
(a) $24$
(b) $12$
(c) $64$
(d) $81$

Step-by-Step Solution

Key Concept: P(4, 3) = 4 * 3 * 2 = 24.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: $24$
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