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2016 LMT
6
2016 LMT Theme #6
2016 LMT Theme #6
Source:
April 11, 2016
Problem Statement
How many functions
f
:
{
1
,
2
,
3
,
4
}
ā
{
1
,
2
,
3
}
f:\{1,2,3,4\}\rightarrow \{1,2,3\}
f
:
{
1
,
2
,
3
,
4
}
ā
{
1
,
2
,
3
}
are surjective?Proposed by Nathan Ramesh
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