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Mathematics
Mathematics
Problem
Let
A
=
{
1
,
2
,
3
,
4
,
5
}
A = \{1, 2, 3, 4, 5\}
A
=
{
1
,
2
,
3
,
4
,
5
}
and
f
:
A
→
A
f: A \to A
f
:
A
→
A
be an into function such that
f
(
i
)
≠
i
,
∀
i
∈
A
f(i) \neq i, \forall i \in A
f
(
i
)
=
i
,
∀
i
∈
A
, then number of such functions
f
f
f
are a. 1024 b. 904 c. 980 d. None of these
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