Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let 
and 
. Then the number of onto functions from 
to 
is
Text Solution
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14
The number of ways to give image to each element of 
in 
is 
.
The total number of ways to give images to the elements of 
in 
But in two of them all the elements of 
have the same image 
or the same image 
(the
mapping being into in these two cases)
The number of onto functions 
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