Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let 
denote the total number of one-one functions from a set 
with 
elements to a set 
with 
elementsand 
denote the total number of one-one functions from the set 
to the set 
.
Then:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
b JEE Main 2021
Number of elements in 
Number of elements in 
Number of elements in 
Number of one-one function 
Number of one-one function 
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